Log Message:
Update to 0.22. Remove dependency on auto* by adding patches for the
generated files.

(Not portability) changes since 0.18:
* Made the GIF loader handle animations with frames whose bounds go outside
  of the base image's bounds (Federico).
* Made the GIF loader handle zero-sized frames that GifBuilder and
  similar crap spits sometimes (Federico).
* The PNM loader doesn't abort() anymore if it cannot allocate memory
  (Federico).
* Fixed a g_object_unref() -> gdk_pixbuf_unref() thinko (Federico).
* Merged the patch from Red Hat Linux 8.0 to fix the crash on
  corrupted/short GIFs - Ximian 29040 (patch by Elliot Lee).
* Fixed the RGB 565 LSB -> MSB case in gdk-pixbuf-drawable - 79463
  (Federico).
* Fixed the update region notification in the BMP loader (Federico).
* Merged the BMP loader changes from GTK+ HEAD -- check all reallocs,
  fix 16bpp BI_RGB thinko, properly handle BI_RLE4 and skips and jumps
  (changes by Matthias Clasen).
* Merged the ICO loader changes from GTK+ HEAD (changes by Matthias
  Clasen).
* Merged changes from gtk+/gdk-pixbuf HEAD into the JPEG loader --
  fixes CMYK JPEG problems (changes by Matthias Clasen).