fate: add -pix_fmt rgb48le to r210 test

Fixes checksum on big endian systems.

tests/fate2.mak

@@ -114,4 +114,4 @@ fate-v410enc: tests/vsynth1/00.pgm
 fate-v410enc: CMD = md5 -f image2 -vcodec pgmyuv -i $(TARGET_PATH)/tests/vsynth1/%02d.pgm -flags +bitexact -vcodec v410 -f avi
 
 FATE_TESTS += fate-r210
-fate-r210: CMD = framecrc -i $(SAMPLES)/r210/r210.avi
+fate-r210: CMD = framecrc -i $(SAMPLES)/r210/r210.avi -pix_fmt rgb48le