libgsm_ms codec depends on libgsm

Originally committed as revision 8045 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -663,6 +663,8 @@ faac_encoder_deps="libfaac"
 liba52_decoder_deps="liba52"
 libgsm_decoder_deps="libgsm"
 libgsm_encoder_deps="libgsm"
+libgsm_ms_decoder_deps="libgsm"
+libgsm_ms_encoder_deps="libgsm"
 libtheora_encoder_deps="libtheora"
 mp3lame_encoder_deps="libmp3lame"
 oggvorbis_decoder_deps="libvorbis"