sunrast: Add fate test for gray8.

Signed-off-by: Janne Grunau <janne-libav@jannau.net>

tests/fate/image.mak

@@ -16,6 +16,9 @@ fate-sunraster-1bit-rle: CMD = framecrc -i $(SAMPLES)/sunraster/lena-1bit-rle.su
 FATE_SUNRASTER += fate-sunraster-8bit-raw
 fate-sunraster-8bit-raw: CMD = framecrc -i $(SAMPLES)/sunraster/lena-8bit-raw.sun -pix_fmt rgb24
 
+FATE_SUNRASTER += fate-sunraster-8bit_gray-raw
+fate-sunraster-8bit_gray-raw: CMD = framecrc -i $(SAMPLES)/sunraster/gray.ras
+
 FATE_SUNRASTER += fate-sunraster-8bit-rle
 fate-sunraster-8bit-rle: CMD = framecrc -i $(SAMPLES)/sunraster/lena-8bit-rle.sun -pix_fmt rgb24
 

tests/ref/fate/sunraster-8bit_gray-raw

@@ -0,0 +1,2 @@
+#tb 0: 1/25
+0,          0,          0,        1,   786432, 0x5859b48e