[Mingw-cross-env-list] updated gtk

[Mark Brand]

 Hi,

I have committed an update to gtk 2.22.0. This required an incremental 
update to glib and also a new separate package gdk-pixbuf.

http://hg.savannah.gnu.org/hgweb/mingw-cross-env/rev/d4914002cfa5

I made some changes to the way the patches are organized. For glib, 
there were several different files for patches. I combined this into one 
"fixes" files containing the separate patches. The main reason for this 
is that it goes well with using a tool like git or mercurial to maintain 
and prepare the patches.

gtk.mk had lots of "sed" edits. I converted these to real diff patches. 
Part of the motivation for this is to make it easier to tell when 
something changes when we upgrade to new versions. The different patches 
are also in one "fixes" file.

Most of the hard work had already been done. I mostly just had to figure 
out how to apply the patches to the new sources.

In both cases, the patches are ad-hoc hacks, not suitable for submitting 
upstream.

Please try this out. Comments (and patches!) are welcome.

regards,

Mark