live555: unbreak build without locale support in toolchain

Fixes:
  http://autobuild.buildroot.net/results/7c1/7c1a1847c5d8ce1d97ef077f26289153660848e8/
  http://autobuild.buildroot.net/results/d2b/d2bb82d0cca04ff66f7d1c8c2f0493f41b43ad3f/
  http://autobuild.buildroot.net/results/3b2/3b2e5f3a3914a3a651086cd8d8520380a7612d7e/
  http://autobuild.buildroot.net/results/c00/c00835074917e14adc759df1b6bdbe3f6221e84e/

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/live555/live555.mk

@@ -11,8 +11,14 @@ LIVE555_LICENSE = LGPLv2.1+
 LIVE555_LICENSE_FILES = COPYING
 LIVE555_INSTALL_STAGING = YES
 
+LIVE555_CFLAGS = $(TARGET_CFLAGS)
+
+ifndef ($(BR2_ENABLE_LOCALE),y)
+LIVE555_CFLAGS += -DLOCALE_NOT_USED
+endif
+
 define LIVE555_CONFIGURE_CMDS
-	echo 'COMPILE_OPTS = $$(INCLUDES) -I. -DSOCKLEN_T=socklen_t $(TARGET_CFLAGS)' >> $(@D)/config.linux
+	echo 'COMPILE_OPTS = $$(INCLUDES) -I. -DSOCKLEN_T=socklen_t $(LIVE555_CFLAGS)' >> $(@D)/config.linux
 	echo 'C_COMPILER = $(TARGET_CC)' >> $(@D)/config.linux
 	echo 'CPLUSPLUS_COMPILER = $(TARGET_CXX)' >> $(@D)/config.linux
 	echo 'LINK = $(TARGET_CXX) -o' >> $(@D)/config.linux