Add explicit "python" to subprocess args in test wrapper script
Add explicit "python" to subprocess args in test wrapper script

Review URL: https://chromiumcodereview.appspot.com/10447031

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@11663 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh