MSYS distutils: Path conversion for --root option

Converts --root=<MSYS/path> to --root=<Windows/path>
as our Python is Windows native. Also, adds a hack to
convert_path because
os.path.join(['C:','folder','subfolder']) returns:
'C:folder\subfolder'
..which isn't the same as:
'C:\folder\subfolder'
2 files changed
tree: 0ad080535331907fa893abdf07e889e158c2da9f
  1. Python-2.7.3/
  2. Python-2.7.4/