libquadmath: mark only for x86

math/libquadmath/Makefile

@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.1 2021/05/16 10:10:54 nia Exp $
+# $NetBSD: Makefile,v 1.2 2021/05/20 06:12:53 nia Exp $
 
 DISTNAME=	gcc-11.1.0
 PKGNAME=	${DISTNAME:S/gcc/libquadmath/}
@@ -17,6 +17,8 @@ GNU_CONFIGURE=	yes
 USE_LIBTOOL=	yes
 INFO_FILES=	yes
 
+ONLY_FOR_PLATFORM=	*-*-i386 *-*-x86_64
+
 GNU_CONFIGURE_STRICT=	no
 
 ## Build outside ${WRKSRC}