Fix test failures in non-English locale.
Fix test failures in non-English locale.

* subversion/tests/cmdline/svntest/main.py: Set C locale.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@872565 13f79535-47bb-0310-9956-ffa450edef68

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