Log Message:
gdk-pixbuf2: update to 2.36.12.

2.36.12
=======
* build: meson fixes for win32
* build: Make --without-libtiff work
* build: Make x11 support optional
* gif, ico, jpeg, tiff, icns: various fixes (#778584, #779012, #753605, #779020, \ 
#779016)
* Implement async loading without threads
* Translation updates