python 2(+3): patches for dirsep as / and sysconfig

0530-msys-mingw-prefer-unix-sep-if-MSYSTEM.patch
0535-msys-cygwin-semi-native-build-sysconfig.patch

Add a bug-fix from Arch Linux mingw-w64-python 2.7.6
for a memory stomp.

Fix python{3.3m}-config.sh to return correct values.

Tidy up the PKGBUILD files.