fate: Convert the paletted output in the brenderpix tests to rgb24

This makes the output consistent on big-endian systems.

tests/fate/image.mak

@@ -15,10 +15,10 @@ FATE_BRENDERPIX += fate-brenderpix-565
 fate-brenderpix-565: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/maximafront.pix
 
 FATE_BRENDERPIX += fate-brenderpix-defpal
-fate-brenderpix-defpal: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/rivrock1.pix
+fate-brenderpix-defpal: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/rivrock1.pix -pix_fmt rgb24
 
 FATE_BRENDERPIX += fate-brenderpix-intpal
-fate-brenderpix-intpal: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/testtex.pix
+fate-brenderpix-intpal: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/testtex.pix -pix_fmt rgb24
 
 FATE_BRENDERPIX += fate-brenderpix-y400a
 fate-brenderpix-y400a: CMD = framecrc -c:v brender_pix -i $(TARGET_SAMPLES)/brenderpix/gears.pix

tests/ref/fate/brenderpix-defpal

@@ -1,2 +1,2 @@
 #tb 0: 1/25
-0,          0,          0,        1,    66560, 0xee71bd50
+0,          0,          0,        1,   196608, 0xada11d14

tests/ref/fate/brenderpix-intpal

@@ -1,2 +1,2 @@
 #tb 0: 1/25
-0,          0,          0,        1,    66560, 0x51a30b0d
+0,          0,          0,        1,   196608, 0x9662f917