Fix utf8_tests.py on systems which support os.putenv() *and* have the en_US.ISO8859-1 locale installed.
Fix utf8_tests.py on systems which support os.putenv() *and* have the
en_US.ISO8859-1 locale installed.

* subversion/tests/clients/cmdline/utf8_tests.py
  (): Set our locale in the environment to pass it to the svn binaries.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@853341 13f79535-47bb-0310-9956-ffa450edef68

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