Reviewed by Darin, landed by Geoff.

    Reviewed by Darin, landed by Geoff.

        http://bugzilla.opendarwin.org/show_bug.cgi?id=9350
        Use pathcmp() when sorting paths in svn-create-patch

        * Scripts/run-webkit-tests: Fixed splitpath() to use File::Basename subroutines instead of regex.
        * Scripts/svn-create-patch: Copied numericcmp(), pathcmp() and splitpath() from run-webkit-tests.
        Changed sort() functions to use pathcmp().  Added subroutine prototypes.  Added -h command-line
        switch and printUsage() subroutine.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@14781 268f45cc-cd09-0410-ab3c-d52691b4dbfc