net/gupnp/av uses C11 - switch to base-clang ports-gcc to fix build on

sparc64

net/gupnp/av/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.32 2021/10/26 14:43:30 jasper Exp $
+# $OpenBSD: Makefile,v 1.33 2022/01/16 20:11:33 kmos Exp $
 
 COMMENT=		helpers for building A/V applications using GUPnP
 
@@ -10,6 +10,10 @@ SHARED_LIBS +=  gupnp-av-1.0         0.1      # 2.0
 MODULES=		devel/meson \
 			x11/gnome
 
+# C11
+COMPILER =		base-clang ports-gcc
+COMPILER_LANGS =	c
+
 WANTLIB += glib-2.0 gobject-2.0 xml2
 
 DEBUG_PACKAGES =	${BUILD_PACKAGES}