martine/ninja — pull request #342 by ClausKlein (2012-06-20 19:46:34+00:00)
Title: Mysys build support

Support bootstrap and ninja on mysys bash shell under Windows

This fix the build on cygwin, and support mingw cross/native build.
On mysys, the shell with g++ is used. NO Microsoft tool is used!
Only the native windows python may be used.

Note: The mysys shell is a bash shell with posix path separator,
the default windows '\' path separator can't be used!