Fix python run_webkit_tests wrapper script to work correctly regardless of whether you're running cygwin python or win32 python and regardless of where you're invoking the script from.
Fix python run_webkit_tests wrapper script to work correctly regardless of
whether you're running cygwin python or win32 python and regardless of
where you're invoking the script from.

    BUG=59958
    TEST=run from the directory above src
    R=jam@chromium.org

Review URL: http://codereview.chromium.org/3995005

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@63467 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser