[PATCH] c++-types-check: Do not run this test if there is no C++ support

[Joseph Myers]

On Tue, 27 Oct 2015, Roland McGrath wrote:

> Follow the example of tst-chk4 et al in debug/Makefile.  That is, just add
> it to tests-unsupported.  There is no need to conditionalize adding it to
> tests or tests-special per se.  But if it's in tests-unsupported it can't
> have an explicit foo.out rule, so for this case conditionalizing its
> addition to tests-special along with the explicit rule makes sense.

As I understand it, tests-unsupported doesn't work at top level.  Cf 
<https://sourceware.org/ml/libc-alpha/2015-08/msg01284.html> and 
<https://sourceware.org/ml/libc-alpha/2015-09/msg00127.html>, where Carlos 
offered to move this test to misc/.

-- 
Joseph S. Myers
joseph@codesourcery.com