PATCH gas for AIX5 on IA-64

[Nick Clifton]

Hi Tim,

> gas/configure: Regenerate
> gas/configure.in: Add AIX configuration.
> gas/config/tc-ia64.c: Use AIX BFD vecs when appropriate.
> gas/config/te-ia64aix.h: New. AIX-specific configuration.

Approved.  But please a line to the ChangeLog that you added
te-ia64aix.h to TARG_ENV_HFILES.

Cheers
        Nick