fate: introduce subtitles.mak and move SubRip test in it.

tests/Makefile

@@ -72,6 +72,7 @@ include $(SRC_PATH)/tests/fate/qt.mak
 include $(SRC_PATH)/tests/fate/qtrle.mak
 include $(SRC_PATH)/tests/fate/real.mak
 include $(SRC_PATH)/tests/fate/screen.mak
+include $(SRC_PATH)/tests/fate/subtitles.mak
 include $(SRC_PATH)/tests/fate/utvideo.mak
 include $(SRC_PATH)/tests/fate/video.mak
 include $(SRC_PATH)/tests/fate/voice.mak

tests/fate/subtitles.mak

+FATE_SUBTITLES += fate-sub-srt
+fate-sub-srt: CMD = md5 -i $(SAMPLES)/sub/SubRip_capability_tester.srt -f ass
+
+FATE_SAMPLES_FFMPEG += $(FATE_SUBTITLES)
+fate-subtitles: $(FATE_SUBTITLES)

tests/fate/video.mak

@@ -194,9 +194,6 @@ fate-smc: CMD = framecrc -i $(SAMPLES)/smc/cass_schi.qt -pix_fmt rgb24
 FATE_VIDEO += fate-sp5x
 fate-sp5x: CMD = framecrc -idct simple -i $(SAMPLES)/sp5x/sp5x_problem.avi
 
-FATE_VIDEO += fate-sub-srt
-fate-sub-srt: CMD = md5 -i $(SAMPLES)/sub/SubRip_capability_tester.srt -f ass
-
 FATE_VIDEO += fate-thp
 fate-thp: CMD = framecrc -idct simple -i $(SAMPLES)/thp/pikmin2-opening1-partial.thp -an