gst-python: fix cross build

srcpkgs/gst-python/template

@@ -1,7 +1,7 @@
 # Template file for 'gst-python'.
 pkgname=gst-python
 version=0.10.22
-revision=6
+revision=7
 lib32disabled=yes
 build_style=gnu-configure
 configure_args="--disable-static"
@@ -17,6 +17,12 @@ homepage="http://gstreamer.freedesktop.org"
 distfiles="$homepage/src/$pkgname/$pkgname-$version.tar.bz2"
 checksum=8f26f519a5bccd770864317e098e5e307fc5ad1201eb96329634b6508b253178
 
+pre_configure() {
+	if [ "$CROSS_BUILD" ]; then
+		sed -i -e "s,PYTHON_INCLUDES=.*,PYTHON_INCLUDES=-I${XBPS_CROSS_BASE}/usr/include/python2.7,g" configure
+	fi
+}
+
 gst-python-devel_package() {
 	lib32disabled=yes
 	depends="${sourcepkg}-${version}_${revision}"