windows: bump up libpng version
windows: bump up pixman version
windows: bump up cairo version
windows: add cairo 1.14 patch to fix following configure failure

checking whether float word ordering is bigendian... strings:
'conftest': No such file
strings: 'conftest': No such file
unknown
configure: error:

Unknown float word ordering. You need to manually preset
ax_cv_c_float_words_bigendian=no (or yes) according to your system.
windows: bump up libxml2 version

And added MinGW32 compilable patch.
${Z_DIR} is suddenly empty.... :<
Merge pull request #30 from cosmo0920/cross-compile-w64-mingw32-cairo1.14

Cross compile w64 mingw32 cairo1.14

Patch by Hiroshi Hatake. Thanks!!!