memfd: Fix typos in memfd tests

I manage to miss source refresh. Sorry.
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

kerndat.c

@@ -404,6 +404,7 @@ static bool kerndat_has_memfd_create(void)
 static bool kerndat_has_memfd_create(void)
 {
 	kdat.has_memfd = false;
+	return 0;
 }
 #endif
 

scripts/feature-tests.mak

@@ -102,6 +102,8 @@ int main(void)
 {
 #ifdef __NR_memfd_create
 	return 0;
+#else
+#error No memfd support
 #endif
 }