internal/rosa/gnu: bison disable broken test

This is miscompiled by the current toolchain.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/gnu.go

@@ -84,7 +84,15 @@ func (t Toolchain) newBison() (pkg.Artifact, string) {
 		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
 		checksum,
 		pkg.TarGzip,
-	), nil, (*MakeHelper)(nil),
+	), nil, &MakeHelper{
+		Check: []string{
+			"TESTSUITEFLAGS=" + jobsFlagE + "' " + skipGNUTests(
+				// clang miscompiles (SIGILL)
+				764,
+			) + "'",
+			"check",
+		},
+	},
 		M4,
 		Diffutils,
 		Sed,