Fix Windows test runner with custom test path.
Fix Windows test runner with custom test path.

* win-tests.py
  (locate_libs): Set APR_ICONV_PATH environment variable to absolute path
  instead of relative, because we could change current directory.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@859236 13f79535-47bb-0310-9956-ffa450edef68

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