package/live555: fix static build with openssl

Use pkg-config to retrieve openssl static dependencies such as -lz or
-latomic.

Moreover, don't pass the openssl libraries to LIBS_FOR_LIVEMEDIA_LIB
when linking statically with ar or the build will break on:

/home/fabrice/buildroot/output/per-package/live555/host/bin/arm-linux-ar cr libliveMedia.a  \
	Media.o MediaSource.o FramedSource.o FramedFileSource.o FramedFilter.o ByteStreamFileSource.o ByteStreamMultiFileSource.o ByteStreamMemoryBufferSource.o BasicUDPSource.o DeviceSource.o AudioInputDevice.o WAVAudioFileSource.o MPEG1or2Demux.o MPEG1or2DemuxedElementaryStream.o MPEGVideoStreamFramer.o MPEG1or2VideoStreamFramer.o MPEG1or2VideoStreamDiscreteFramer.o MPEG4VideoStreamFramer.o MPEG4VideoStreamDiscreteFramer.o H264or5VideoStreamFramer.o H264or5VideoStreamDiscreteFramer.o H264VideoStreamFramer.o H264VideoStreamDiscreteFramer.o H265VideoStreamFramer.o H265VideoStreamDiscreteFramer.o MPEGVideoStreamParser.o MPEG1or2AudioStreamFramer.o MPEG1or2AudioRTPSource.o MPEG4LATMAudioRTPSource.o MPEG4ESVideoRTPSource.o MPEG4GenericRTPSource.o MP3FileSource.o MP3Transcoder.o MP3ADU.o MP3ADUdescriptor.o MP3ADUinterleaving.o MP3ADUTranscoder.o MP3StreamState.o MP3Internals.o MP3InternalsHuffman.o MP3InternalsHuffmanTable.o MP3ADURTPSource.o MPEG1or2VideoRTPSource.o MPEG2TransportStrea
 mMultiplexor.o MPEG2TransportStreamFromPESSource.o MPEG2TransportStreamFromESSource.o MPEG2TransportStreamFramer.o MPEG2TransportStreamAccumulator.o ADTSAudioFileSource.o ADTSAudioStreamDiscreteFramer.o JPEGVideoSource.o JPEGVideoRTPSource.o JPEG2000VideoRTPSource.o H263plusVideoRTPSource.o H263plusVideoStreamFramer.o H263plusVideoStreamParser.o AC3AudioStreamFramer.o AC3AudioRTPSource.o DVVideoStreamFramer.o DVVideoRTPSource.o AMRAudioSource.o AMRAudioFileSource.o InputFile.o StreamReplicator.o MediaSink.o FileSink.o BasicUDPSink.o AMRAudioFileSink.o H264or5VideoFileSink.o H264VideoFileSink.o H265VideoFileSink.o OggFileSink.o MPEG1or2AudioRTPSink.o MP3ADURTPSink.o MPEG1or2VideoRTPSink.o MPEG4LATMAudioRTPSink.o MPEG4GenericRTPSink.o MPEG4ESVideoRTPSink.o JPEGVideoRTPSink.o JPEG2000VideoRTPSink.o H263plusVideoRTPSink.o H264or5VideoRTPSink.o H264VideoRTPSink.o H265VideoRTPSink.o DVVideoRTPSink.o AC3AudioRTPSink.o VorbisAudioRTPSink.o TheoraVideoRTPSink.o VP8VideoRTPSink.o VP9V
 ideoRTPSink.o GSMAudioRTPSink.o SimpleRTPSink.o AMRAudioRTPSink.o T140TextRTPSink.o OutputFile.o RawVideoRTPSink.o uLawAudioFilter.o RTPSource.o MultiFramedRTPSource.o SimpleRTPSource.o H261VideoRTPSource.o H264VideoRTPSource.o H265VideoRTPSource.o QCELPAudioRTPSource.o AMRAudioRTPSource.o VorbisAudioRTPSource.o TheoraVideoRTPSource.o VP8VideoRTPSource.o VP9VideoRTPSource.o RawVideoRTPSource.o RTPSink.o MultiFramedRTPSink.o AudioRTPSink.o VideoRTPSink.o TextRTPSink.o RTPInterface.o RTCP.o rtcp_from_spec.o GenericMediaServer.o RTSPServer.o RTSPServerRegister.o RTSPClient.o RTSPCommon.o RTSPRegisterSender.o SIPClient.o MediaSession.o ServerMediaSession.o PassiveServerMediaSubsession.o OnDemandServerMediaSubsession.o FileServerMediaSubsession.o MPEG4VideoFileServerMediaSubsession.o H264VideoFileServerMediaSubsession.o H265VideoFileServerMediaSubsession.o H263plusVideoFileServerMediaSubsession.o WAVAudioFileServerMediaSubsession.o AMRAudioFileServerMediaSubsession.o MP3AudioFile
 ServerMediaSubsession.o MPEG1or2VideoFileServerMediaSubsession.o MPEG1or2FileServerDemux.o MPEG1or2DemuxedServerMediaSubsession.o MPEG2TransportFileServerMediaSubsession.o ADTSAudioFileServerMediaSubsession.o DVVideoFileServerMediaSubsession.o AC3AudioFileServerMediaSubsession.o MPEG2TransportUDPServerMediaSubsession.o ProxyServerMediaSession.o QuickTimeFileSink.o QuickTimeGenericRTPSource.o AVIFileSink.o MPEG2IndexFromTransportStream.o MPEG2TransportStreamIndexFile.o MPEG2TransportStreamTrickModeFilter.o MatroskaFile.o MatroskaFileParser.o EBMLNumber.o MatroskaDemuxedTrack.o MatroskaFileServerDemux.o MatroskaFileServerMediaSubsession.o MP3AudioMatroskaFileServerMediaSubsession.o OggFile.o OggFileParser.o OggDemuxedTrack.o OggFileServerDemux.o OggFileServerMediaSubsession.o MPEG2TransportStreamDemux.o MPEG2TransportStreamDemuxedTrack.o MPEG2TransportStreamParser.o MPEG2TransportStreamParser_PAT.o MPEG2TransportStreamParser_PMT.o MPEG2TransportStreamParser_STREAM.o HLSSegment
 er.o TLSState.o MIKEY.o SRTPCryptographicContext.o HMAC_SHA1.o BitVector.o StreamParser.o DigestAuthentication.o ourMD5.o Base64.o Locale.o -L/home/fabrice/buildroot/output/per-package/live555/host/bin/../arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib -lssl -L/home/fabrice/buildroot/output/per-package/live555/host/bin/../arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib -lz -latomic -lpthread -lcrypto -lz -latomic -lpthread
/home/fabrice/buildroot/output/per-package/live555/host/bin/arm-linux-ar: invalid option -- 'L'

Fixes:
 - http://autobuild.buildroot.org/results/1299a05cfaabccc45e2878e969b443a973ec4c9e

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Reviewed-by: Michael Nosthoff<buildroot@heine.tech>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit cb7a22db6bcfce89848540e5f3a1618fedb54eef)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/live555/live555.mk

@@ -27,8 +27,12 @@ LIVE555_CFLAGS += -fPIC
 endif
 
 ifeq ($(BR2_PACKAGE_OPENSSL),y)
-LIVE555_DEPENDENCIES += openssl
-LIVE555_LIBS = -lssl -lcrypto
+LIVE555_DEPENDENCIES += host-pkgconf openssl
+LIVE555_CONSOLE_LIBS = `$(PKG_CONFIG_HOST_BINARY) --libs openssl`
+# passed to ar for static linking, which gets confused by -L<dir>
+ifneq ($(BR2_STATIC_LIBS),y)
+LIVE555_LIVEMEDIA_LIBS = $(LIVE555_CONSOLE_LIBS)
+endif
 else
 LIVE555_CFLAGS += -DNO_OPENSSL
 endif
@@ -48,8 +52,8 @@ define LIVE555_CONFIGURE_CMDS
 	# Must have a whitespace at the end of LIBRARY_LINK, otherwise static link
 	# fails
 	echo 'LIBRARY_LINK = $(LIVE555_LIBRARY_LINK) ' >> $(@D)/config.$(LIVE555_CONFIG_TARGET)
-	echo 'LIBS_FOR_CONSOLE_APPLICATION = $(LIVE555_LIBS)' >> $(@D)/config.$(LIVE555_CONFIG_TARGET)
-	echo 'LIBS_FOR_LIVEMEDIA_LIB = $(LIVE555_LIBS)' >> $(@D)/config.$(LIVE555_CONFIG_TARGET)
+	echo 'LIBS_FOR_CONSOLE_APPLICATION = $(LIVE555_CONSOLE_LIBS)' >> $(@D)/config.$(LIVE555_CONFIG_TARGET)
+	echo 'LIBS_FOR_LIVEMEDIA_LIB = $(LIVE555_LIVEMEDIA_LIBS)' >> $(@D)/config.$(LIVE555_CONFIG_TARGET)
 	(cd $(@D); ./genMakefiles $(LIVE555_CONFIG_TARGET))
 endef