Python 3 compatibility: Try to use subprocess module in 'build' directory.
Python 3 compatibility:
Try to use subprocess module in 'build' directory.

* build/generator/util/executable.py
  (output): Try to use subprocess module.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@873265 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion