fate: Use bitexact conversions in the dpxparser test

This fixes fate on e.g. ppc.
Signed-off-by: Martin Storsjö <martin@martin.st>

tests/fate/image.mak

@@ -34,7 +34,7 @@ FATE_SAMPLES_AVCONV-$(call DEMDEC, IMAGE2, DPX) += fate-dpx
 fate-dpx: CMD = framecrc -i $(TARGET_SAMPLES)/dpx/lighthouse_rgb48.dpx
 
 FATE_SAMPLES_AVCONV-$(call PARSERDEMDEC, DPX, IMAGE2PIPE, DPX) += fate-dpxparser
-fate-dpxparser: CMD = framecrc -f image2pipe -i $(TARGET_SAMPLES)/dpx/libav_4x_concat.dpx
+fate-dpxparser: CMD = framecrc -f image2pipe -i $(TARGET_SAMPLES)/dpx/libav_4x_concat.dpx -sws_flags +accurate_rnd+bitexact
 
 FATE_EXR += fate-exr-slice-raw
 fate-exr-slice-raw: CMD = framecrc -i $(TARGET_SAMPLES)/exr/rgba_slice_raw.exr -pix_fmt rgba64le