Use pkg-config for libschroedinger libs, not only for CFLAGS.

patch by JonY, 10walls gmail com

Originally committed as revision 13141 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -1646,7 +1646,7 @@ enabled libgsm     && require  libgsm gsm.h gsm_create -lgsm
 enabled libmp3lame && require  LAME lame/lame.h lame_init -lmp3lame -lm
 enabled libnut     && require  libnut libnut.h nut_demuxer_init -lnut
 enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) \
-                        && require libschroedinger schroedinger/schro.h schro_init -lschroedinger-1.0 -lpthread -loil-0.3 -lm -lrt
+                        && require libschroedinger schroedinger/schro.h schro_init $(pkg-config --libs schroedinger-1.0)
 enabled libtheora  && require  libtheora theora/theora.h theora_info_init -ltheora -logg
 enabled libvorbis  && require  libvorbis vorbis/vorbisenc.h vorbis_info_init -lvorbisenc -lvorbis -logg
 enabled libx264    && require  x264 x264.h x264_encoder_open -lx264 -lm