Bug 488800. qcms: accept ICCv4 profiles. r=bobbyholley

ICCv4 profiles are a superset of ICCv2 so it shouldn't hurt us to accept them and
just treat them the same way we do ICCv2 profiles.

gfx/qcms/iccread.c

@@ -148,10 +148,12 @@ static void check_profile_version(struct mem_source *src)
 	uint8_t minor_revision = read_u8(src, 8 + 1);
 	uint8_t reserved1      = read_u8(src, 8 + 2);
 	uint8_t reserved2      = read_u8(src, 8 + 3);
+	if (major_revision != 0x4) {
 		if (major_revision > 0x2)
 			invalid_source(src, "Unsupported major revision");
 		if (minor_revision > 0x40)
 			invalid_source(src, "Unsupported minor revision");
+	}
 	if (reserved1 != 0 || reserved2 != 0)
 		invalid_source(src, "Invalid reserved bytes");
 }