Fix path for Windows

On Windows 'python3.exe -m venv <name>' fails but
'python.exe -m venv <name>' is successful, so I need to copy
python3.exe to python.exe and launch using python.exe. I found a
couple references to this online but no canonical bug.

Also because of the number of files in the mingw package it was put
in CIPD inside a prefix. Adding that prefix to PATH.

Bug: 107
Change-Id: Ia9eb13f2221b9cf388146666ddf204f28bf8bd73
7 files changed
tree: 278047ee9dcfa69b368fa047fba0f3bd39e74090
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. recipes.py