[gtk+] Updated patchset
[glib] Update to 2.36 now it supports atomics on Mac again
[cairo] Update to 1.12.14 for perf fixes and to reduce patchset
[pango] Update to 1.34.0 to reduce patchset
[pango,cairo] Add patches for astral plane glyph support
Use specific revisions of theme engines
Update toolchain and gtk+ deps to latest stable versions
Use libjpeg-turbo instead of libjpeg

It's abi-compatible and 2-4 times as fast, used already by
Firefox and Chrome.
Revert "Switch freedesktop.org pkgs to use our own server."

This reverts commit 4a332d4b94bdc4daad886d6a1445113ea5040e31.

Let's not start running public mirrors of individual FDO packages.
That way lies madness.
Merge branch 'update-gtk-stack' into mono-master

Conflicts:
	packages/cairo.py