games-misc/opengfx: restrict tests

Test failures seem somewhat expected here w/ changing versions of deps
and these don't seem to be run in upstream CI either.

It's a shame, though, as they found a real issue in the past (bug #320797).

Bug: https://bugs.gentoo.org/320797
Closes: https://bugs.gentoo.org/928269
Signed-off-by: Sam James <sam@gentoo.org>

games-misc/opengfx/opengfx-7.1.ebuild

@@ -15,6 +15,8 @@ S="${WORKDIR}/${P}-source"
 LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="~amd64 ~arm ~arm64 ~x86"
+# Mismatch appears somewhat intentional w/ changing versions of deps (bug #928269)
+RESTRICT="test"
 
 BDEPEND="
 	games-util/grfcodec