[PATCH] cs_CZ locale: fix collation [BZ #22336]

[Mike FABIAN]

            [BZ #22336]
            * localedata/locales/cs_CZ (LC_COLLATE): Use “copy "iso14651_t1"”
            and implement the collation rules for cs from CLDR on top of that.
            * Makefile: Add cs_CZ.UTF-8 to test-input and to the list
            of locales to be built for testing.
            * cs_CZ.UTF-8.in: New file with test data to test the Czech sorting.

Difference in sorting of the added test file (added in the patch)
before and after applying the sorting changes of the patch:

$ diff -u cs_CZ.UTF-8.in.old cs_CZ.UTF-8.in 
--- cs_CZ.UTF-8.in.old  2017-11-24 16:47:52.688348458 +0530
+++ cs_CZ.UTF-8.in      2017-11-24 16:42:08.364221944 +0530
@@ -1,7 +1,3 @@
-È¥
-Ȥ
-Ê’
-Æ·
 a
 a
 a
@@ -65,7 +61,6 @@
 cenných
 cenným
 cenou
-cH
 cvrček
 cz
 cZ
@@ -94,8 +89,9 @@
 H
 hruška
 ch
-CH
+cH
 Ch
+CH
 chřestýšům
 Chřestýšům
 chřipka
@@ -188,6 +184,8 @@
 Z
 ź
 Ź
+È¥
+Ȥ
 za
 Za
 źa
@@ -209,6 +207,8 @@
 Žb
 žluva
 Žluva
+Ê’
+Æ·
 0
 1
 1

I think "cH" was sorted completely wrong before and "CH" slightly
wrong as well. So this patch seems to not only base the Czech
LC_COLLATE implementation on the iso14651_t1 file as requested in this
bug but also improves the sorting of the uppercase/lowercase variants
of the ch digraph.

And of course it improves the sorting of some non-Czech characters
like ʒ and ȥ because these were not handled at all in the old
Czech LC_COLLATE implementation.

-- 
Mike FABIAN <mfabian@redhat.com>

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