Count miscellaneous files built on host for testing as tests.

Count miscellaneous files built on host for testing as tests.

In <https://sourceware.org/ml/libc-alpha/2014-01/msg00198.html> I
raised the question of counting miscellaneous dependencies of tests,
built on the host rather than the build system, as tests, so that when
test failures don't stop "make check" neither do those other builds on
the host, so that a flaky host doesn't stop "make check" from
producing a complete summary of test results.  Brooks supported that
idea in <https://sourceware.org/ml/libc-alpha/2014-02/msg00301.html>.

This patch implements that change for all the examples I could find:
one message catalog in catgets/, locales in localedata/ and timezone
files in timezone/.

Tested x86_64.

	* catgets/Makefile (tests-special): Add $(objpfx)sample.SJIS.cat.
	($(objpfx)sample.SJIS.cat): Use $(evaluate-test).
	* timezone/Makefile (testdata): Move definition above include of
	Rules.
	(test-zones): New variable.
	(tests-special): Add zone files.
	(build-testdata): Use $(evaluate-test).

localedata/ChangeLog:
	* Makefile (LOCALES): Move definition above include of Rules.
	(LOCALE_SRCS): Likewise.
	(CHARMAPS): Likewise.
	(CTYPE_FILES): Likewise.
	(tests-special): Add locale files.
	($(addprefix $(objpfx),$(CTYPE_FILES))): Use $(evaluate-test).