MVK: link libmpg123 statically

MobileVLCKit/MobileVLCKit.xcconfig

@@ -27,6 +27,7 @@ HARFBUZZ=$(VLC_CONTRIB_DIR)/lib/libharfbuzz.a
 LIVE555=$(VLC_CONTRIB_DIR)/lib/libUsageEnvironment.a $(VLC_CONTRIB_DIR)/lib/libBasicUsageEnvironment.a $(VLC_CONTRIB_DIR)/lib/libgroupsock.a $(VLC_CONTRIB_DIR)/lib/libz.a $(VLC_CONTRIB_DIR)/lib/libliveMedia.a
 MKV=$(VLC_CONTRIB_DIR)/lib/libebml.a $(VLC_CONTRIB_DIR)/lib/libmatroska.a
 MODPLUG=$(VLC_CONTRIB_DIR)/lib/libmodplug.a
+MP3=$(VLC_CONTRIB_DIR)/lib/libmpg123.a
 OPUS=$(VLC_CONTRIB_DIR)/lib/libopus.a
 OGG=$(VLC_CONTRIB_DIR)/lib/libogg.a $(VLC_CONTRIB_DIR)/lib/libtheora.a $(VLC_CONTRIB_DIR)/lib/libtheoradec.a $(VLC_CONTRIB_DIR)/lib/libtheoraenc.a $(VLC_CONTRIB_DIR)/lib/libvorbis.a $(VLC_CONTRIB_DIR)/lib/libvorbisenc.a $(VLC_CONTRIB_DIR)/lib/libvorbisfile.a
 PICS=$(VLC_CONTRIB_DIR)/lib/libpng.a $(VLC_CONTRIB_DIR)/lib/libopenjpeg.a
@@ -37,4 +38,4 @@ XML=$(VLC_CONTRIB_DIR)/lib/libxml2.a
 ZLIB=$(VLC_CONTRIB_DIR)/lib/libz.a
 ZVBI=$(VLC_CONTRIB_DIR)/lib/libzvbi.a
 
-OTHER_LIBTOOLFLAGS=$(ASS) $(AVCODEC) $(DVBPSI) $(FLAC) $(FRIBIDI) $(FREETYPE) $(GCRYPT) $(HARFBUZZ) $(LIVE555) $(MKV) $(MODPLUG) $(OGG) $(OPUS) $(PICS) $(SPEEX) $(TAGLIB) $(XML) $(VPX) $(ZLIB) $(ZVBI) $(VLC_INSTALL_DIR)/lib/vlc/libcompat.a  $(VLC_INSTALL_DIR)/lib/libvlc.a $(VLC_INSTALL_DIR)/lib/libvlccore.a $(VLC_PLUGINS_LDFLAGS) $(OTHER_CFLAGS)
+OTHER_LIBTOOLFLAGS=$(ASS) $(AVCODEC) $(DVBPSI) $(FLAC) $(FRIBIDI) $(FREETYPE) $(GCRYPT) $(HARFBUZZ) $(LIVE555) $(MKV) $(MODPLUG) $(MP3) $(OGG) $(OPUS) $(PICS) $(SPEEX) $(TAGLIB) $(XML) $(VPX) $(ZLIB) $(ZVBI) $(VLC_INSTALL_DIR)/lib/vlc/libcompat.a  $(VLC_INSTALL_DIR)/lib/libvlc.a $(VLC_INSTALL_DIR)/lib/libvlccore.a $(VLC_PLUGINS_LDFLAGS) $(OTHER_CFLAGS)