Merge changes Iae7e0d69,Ie85b61e3,Iddf0e7d0,I3f2e1444,Ib40c38df

* changes:
  gn2bp: add support for actions calling write_build_config.py
  gn2bp: fix genrule cmd escaping
  gn2bp: update update_results.sh to build //net:net
  gn2bp: clean up argument parsing
  gn2bp: explicitly replace out arg