glib-2.0: updgrade glib from Yocto master

Needed for Mutter
librsvg.bbappend: fix staging of native package

Patch sumbitted to oe-core
gnome-themes-standard: package 3.8.1

Needed for mutter
mutter: fix RDEPENDS

mutter needs both gsettings-desktop-schemas gnome-themes-standard to run.