[v3] add missing dg-require to tests

[Jonathan Wakely]

On 7 November 2011 20:58, Eric Botcazou wrote:
>> Tested x86_64-linux and committed to trunk.
>>
>>         * testsuite/30_threads/async/49668.cc: Add missing dg-require.
>>         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
>
> We have a related failure on SPARC/Solaris for some time:
>
> FAIL: 30_threads/call_once/49668.cc (test for excess errors)
> WARNING: 30_threads/call_once/49668.cc compilation failed to produce executable
>
> [...]
> /nile.build/botcazou/gcc-head/sparc-sun-solaris2.8/sparc-sun-solaris2.8/libstdc\
> ++-v3/include/tuple:105:12: error: use of deleted
> function 'moveable::moveable(const moveable&)'
> /nile.build/botcazou/gcc-head/src/libstdc++-v3/testsuite/30_threads/call_once/49668.cc
>
> It can be reproduced with a cross-compiler targetting sparc-sun-solaris2.9 and
> the .ii file.  I can open a PR if you want.

I'll look into it - thanks