libpng: forcefully disable neon on armv6l.

srcpkgs/libpng/template

@@ -1,7 +1,7 @@
 # Template build file for 'libpng'.
 pkgname=libpng
 version=1.6.8
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="ac_cv_func_strtod=yes"
 makedepends="zlib-devel"
@@ -12,6 +12,10 @@ license="zlib"
 distfiles="${SOURCEFORGE_SITE}/$pkgname/$pkgname-$version.tar.xz"
 checksum=24f73d8b5e1d74a9482c81b65c3f93f96c7da7ed0417b8a948a75d2d99133081
 
+if [ "$XBPS_TARGET_MACHINE" = "armv6l" ]; then
+	configure_args+=" --disable-arm-neon"
+fi
+
 post_install() {
 	rm -f ${DESTDIR}/usr/lib/*.la
 	vinstall LICENSE 644 usr/share/licenses/${pkgname}