fate/subtitles: Ignore line endings for sub-scc test

Since 7bf1b9b35769b37684dd2f18a54f01d852a540c8,
the test produces ordinary \n, yet this is not what the reference
file used for the most time, leading to test failures.

Reviewed-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
(cherry picked from commit 99d33cc661fbd04e8657831b818042b11f1862a2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
diff --git a/tests/fate/subtitles.mak b/tests/fate/subtitles.mak
index 8c310ad..f804f82 100644
--- a/tests/fate/subtitles.mak
+++ b/tests/fate/subtitles.mak
@@ -99,6 +99,7 @@
 
 FATE_SUBTITLES-$(call DEMDEC, SCC, CCAPTION) += fate-sub-scc
 fate-sub-scc: CMD = fmtstdout ass -ss 57 -i $(TARGET_SAMPLES)/sub/witch.scc
+fate-sub-scc: CMP = diff
 
 FATE_SUBTITLES-$(call ENCMUX, ASS, ASS) += $(FATE_SUBTITLES_ASS-yes)
 FATE_SUBTITLES += $(FATE_SUBTITLES-yes)