FATE: use a less ambiguous end time for filter-trim-time test

0.1 seconds at 25 fps is exactly 2.5 frames, which may be rounded either
to 2 or 3 on different platforms.

tests/fate/filter-video.mak

@@ -52,7 +52,7 @@ FATE_TRIM += fate-filter-trim-mixed
 fate-filter-trim-mixed: CMD = framecrc -i $(SRC) -vf trim=start=0.2:end=0.4:start_frame=1:end_frame=3
 
 FATE_TRIM += fate-filter-trim-time
-fate-filter-trim-time: CMD = framecrc -i $(SRC) -vf trim=0:0.1
+fate-filter-trim-time: CMD = framecrc -i $(SRC) -vf trim=0:0.09
 
 FATE_FILTER_VSYNTH-$(CONFIG_TRIM_FILTER) += $(FATE_TRIM)