pgsql: The Czech (cs_CZ) and Slovak (sk_SK) locales sort numbers after

Log Message:
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The Czech (cs_CZ) and Slovak (sk_SK) locales sort numbers after letters,
instead of vice versa. Update the regression test expectations to support
that. In the plpgsql test, adjust the test data so that this isn't an
issue. In the char and varchar tests, add new expected files.

Modified Files:
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pgsql/src/test/regress/expected:
plpgsql.out (r1.67 -> r1.68)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/plpgsql.out?r1=1.67&r2=1.68)
pgsql/src/test/regress/sql:
plpgsql.sql (r1.57 -> r1.58)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/plpgsql.sql?r1=1.57&r2=1.58)

Added Files:
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pgsql/src/test/regress/expected:
char_2.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/char_2.out?rev=1.1&content-type=text/x-cvsweb-markup)
varchar_2.out (r1.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/varchar_2.out?rev=1.1&content-type=text/x-cvsweb-markup)