package/linphone: alsa support in mediastreamer needs alsa_lib_mixer

Fixes
http://autobuild.buildroot.net/results/dd6/dd6cbff641028b25303c3b462e2058b56e53f1dd/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linphone/linphone.mk

@@ -36,6 +36,13 @@ endif
 # needed for bundled mediastreamer2
 LINPHONE_DEPENDENCIES += host-intltool host-gettext
 
+ifeq ($(BR2_PACKAGE_ALSA_LIB_MIXER)$(BR2_PACKAGE_ALSA_LIB_PCM),yy)
+LINPHONE_CONF_OPTS += --enable-alsa
+LINPHONE_DEPENDENCIES += alsa-lib
+else
+LINPHONE_CONF_OPTS += --disable-alsa
+endif
+
 ifeq ($(BR2_PACKAGE_LIBV4L),y)
 LINPHONE_CONF_OPTS += --enable-libv4l1 --enable-libv4l2
 LINPHONE_DEPENDENCIES += libv4l