Support for extended vector concatenation beyond OpenCL (PR15780)

[John Stratton]

Pinging this proposed patch to fix bug 15780.

On 4/18/13, John Stratton <john at multicorewareinc.com> wrote:
> Summary: changed some conditions in Sema/SemaInit.cpp to check for
> ExtVectorType instead of getLangOpts().OpenCL && VectorType, and added
> test case to Sema/vector-init.c.  Feedback appreciated.
>
> Regards,
> --John Stratton
>