[v3] Minimally exercise the other alias_decls in <type_traits>

[Paolo Carlini]

On 10/15/2014 07:35 PM, Mike Stump wrote:
> On Oct 15, 2014, at 8:41 AM, Paolo Carlini <paolo.carlini@oracle.com> wrote:
>> ... the below replaces -std=c++0x and -std=c++11 with -std=gnu++11.
> Seems odd to go from c++11 -> gnu++11.  Why?
Because all the new testcases we are committing use -std=gnu++11, which 
is right, because the current default is -std=gnu++98, *not* -std=c++98.

Paolo.