freedroidRPG: needs -fcommon for gcc10

[ci skip]

srcpkgs/freedroidRPG/template

@@ -16,9 +16,11 @@ distfiles="http://ftp.osuosl.org/pub/freedroid/${pkgname}-${version%.*}/${pkgnam
 checksum=426df175034b12095e7498fd80c907e507667c960ee1da331d9e5566d1b09358
 python_version=2
 
-case "$XBPS_TARGET_MACHINE" in
-	*-musl)	configure_args+=" --disable-backtrace"
-esac
+if [ "$XBPS_TARGET_LIBC" = "musl" ]; then
+	configure_args+=" --disable-backtrace"
+fi
+
+CFLAGS="-fcommon"
 
 post_install() {
 	local script=freedroid