This updates gdk-pixbuf to version 2.24.0 and fixes some flags to
configure that were not correct for OSX or were not set correctly
due to strange defaults settings on this build.
--disable-maintainer-mode gets set because it defaults on.
--enable-debug=no gets set because its [no,min,max,auto]
--enable-instrospection=no gets set because it's desired.
--disable-Bsymbolic gets set because it's only for elf32.
--without-gdiplus gets set because it's for Windows.
This compiles with gcc-4.2.1, llvm-2335.9, and clang-2.0 from
XCode-4.0.2 on x86_64 10.6.8.
ClosesHomebrew/homebrew#8112.
Signed-off-by: Charlie Sharpsteen <source@sharpsteen.net>
