[PATCH] pl_PL locale: fix collation [BZ #22469]

[Mike FABIAN]

      [BZ #22469]
       * localedata/locales/pl_PL (LC_COLLATE): Use “copy "iso14651_t1"”
       and implement the collation rules for pl from CLDR on top of that.
       * Makefile: Add pl_PL.UTF-8 to test-input and to the list
       of locales to be built for testing.
       * pl_PL.UTF-8.in: New file with test data to test the Polish sorting.

The patch contains a test file: localedata/pl_PL.UTF-8.in
This file shows how the strings are sorted in Polish locale after the  patch is
applied. It improves the sorting of some characters not used in Polish
like Æ·, because these were not handled at all in the original LC_COLLATE
of the Polish locale and are now  sorted better because of the
“copy "iso14651_t1"”. All characters actually used in Polish sort the
same way as before.

-- 
Mike FABIAN <mfabian@redhat.com>
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