create python.exe file after compilation

[brunobord]

refs: https://github.com/qw3rtman/p/issues/11 warning: this might not be the fix you're expecting, my shell-fu is far from stellar.

[qw3rtman]

See my response on #11.

We must check for the existence of python.exe prior to creating the symbolic link as if python.exe does not exist (due to a compilation error, for example), the symbolic link will not be created.