ibus: also install gi overrides for python3

srcpkgs/ibus/template

@@ -1,7 +1,7 @@
 # Template file for 'ibus'
 pkgname=ibus
 version=1.5.20
-revision=3
+revision=4
 build_style=gnu-configure
 build_helper="gir"
 configure_args="--enable-ui --enable-gtk3 --disable-tests
@@ -42,6 +42,10 @@ pre_install() {
 	vmkdir etc/dconf/db
 }
 
+post_install() {
+	vinstall bindings/pygobject/gi/overrides/IBus.py 644 ${py3_sitelib}/gi/overrides
+}
+
 ibus-devel_package() {
 	depends="libglib-devel ibus-${version}_${revision}"
 	short_desc+=" - development files"