Changed line numbers in patch of distutils

Currently on Windows I have the problem that 
```
  conda skeleton pypi <package name>
```
fails because there is a patch of disutils which cannot be applied. See #119.
It seems that adjusting the line specifications in the patch code fixes
this issue for me. After the modifcations the distuils patch can still be applied by Linux' `patch` tool.
What I don't understand is why the previous lines numbers worked with GNU patch.