Add $(EXESUF) where necessary, fixes regression tests under MinGW.

patch by Víctor Paesa, wzrlpy $@$ arsystel dot com

Originally committed as revision 5924 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/Makefile

@@ -21,7 +21,7 @@ test-server: vsynth1/0.pgm asynth1.sw
 	@$(VPATH)/server-regression.sh $(SERVER_REFFILE) $(VPATH)/test.conf
 
 # fast regression tests for all codecs
-codectest mpeg4 mpeg ac3 snow snowll: vsynth1/0.pgm vsynth2/0.pgm asynth1.sw tiny_psnr
+codectest mpeg4 mpeg ac3 snow snowll: vsynth1/0.pgm vsynth2/0.pgm asynth1.sw tiny_psnr$(EXESUF)
 	@$(VPATH)/regression.sh $@ $(REFFILE1) vsynth1
 	@$(VPATH)/regression.sh $@ $(REFFILE2) vsynth2
 
@@ -31,11 +31,11 @@ libavtest: vsynth1/0.pgm asynth1.sw
 
 # video generation
 
-vsynth1/0.pgm: videogen
+vsynth1/0.pgm: videogen$(EXESUF)
 	@mkdir -p vsynth1
 	./videogen 'vsynth1/'
 
-vsynth2/0.pgm: rotozoom
+vsynth2/0.pgm: rotozoom$(EXESUF)
 	@mkdir -p vsynth2
 	./rotozoom 'vsynth2/' $(VPATH)/lena.pnm
 
@@ -47,7 +47,7 @@ rotozoom$(EXESUF): rotozoom.c
 
 # audio generation
 
-asynth1.sw: audiogen
+asynth1.sw: audiogen$(EXESUF)
 	./audiogen $@
 
 audiogen$(EXESUF): audiogen.c