Update Unicode-Collate to CPAN version 0.72

Update Unicode-Collate to CPAN version 0.72

  Second attempt to integrate the XS version of
  Unicode::Collate into core.

  [DELTA]

  0.72  Sat Jan 22 17:28:32 2011
    - xs: fix mixing char* and U8*.

  0.71  Tue Jan 18 22:29:44 2011
    - t/loc_test.t should not fail without Unicode::Normalize.

  0.70  Sun Jan 16 20:31:07 2011
    - Now U::C::Locale->new will use the compiled DUCET via XS if available.
      added some tests in t/loc_test.t.

  0.69  Sat Jan 15 19:41:11 2011
    - clarified about XSUB. revised INSTALL in README.
    - xs: flag passed to utf8n_to_uvuni().
    - doc and comments: [perl #81876] Fix typos by Peter J. Acklam.