FATE: fix targa tests on big-endian systems

tests/fate/image.mak

@@ -48,13 +48,13 @@ fate-targa: $(FATE_TARGA)
 
 fate-targa-conformance-CBW8:  CMD = framecrc -i $(SAMPLES)/targa-conformance/CBW8.TGA
 # fate-targa-conformance-CCM8:  CMD = framecrc -i $(SAMPLES)/targa-conformance/CCM8.TGA
-fate-targa-conformance-CTC16: CMD = framecrc -i $(SAMPLES)/targa-conformance/CTC16.TGA
+fate-targa-conformance-CTC16: CMD = framecrc -i $(SAMPLES)/targa-conformance/CTC16.TGA -pix_fmt rgb555le
 fate-targa-conformance-CTC24: CMD = framecrc -i $(SAMPLES)/targa-conformance/CTC24.TGA
-fate-targa-conformance-CTC32: CMD = framecrc -i $(SAMPLES)/targa-conformance/CTC32.TGA
+fate-targa-conformance-CTC32: CMD = framecrc -i $(SAMPLES)/targa-conformance/CTC32.TGA -pix_fmt bgra
 fate-targa-conformance-UBW8:  CMD = framecrc -i $(SAMPLES)/targa-conformance/UBW8.TGA
 # fate-targa-conformance-UCM8:  CMD = framecrc -i $(SAMPLES)/targa-conformance/UCM8.TGA
-fate-targa-conformance-UTC16: CMD = framecrc -i $(SAMPLES)/targa-conformance/UTC16.TGA
+fate-targa-conformance-UTC16: CMD = framecrc -i $(SAMPLES)/targa-conformance/UTC16.TGA -pix_fmt rgb555le
 fate-targa-conformance-UTC24: CMD = framecrc -i $(SAMPLES)/targa-conformance/UTC24.TGA
-fate-targa-conformance-UTC32: CMD = framecrc -i $(SAMPLES)/targa-conformance/UTC32.TGA
+fate-targa-conformance-UTC32: CMD = framecrc -i $(SAMPLES)/targa-conformance/UTC32.TGA -pix_fmt bgra
 
 fate-targa-top-to-bottom: CMD = framecrc -i $(SAMPLES)/targa/lena-top-to-bottom.tga