[PATCH][MIPS] Fix ext, dextm, dextu size checking

[Chao-Ying Fu]

Richard Sandiford wrote:
> > (Somehow my account at chaoyingfu@sources.redhat.com doesn't work,
> > so I cannot add these two files to CVS.)
> 
> Just to check, have you tried @sourceware.org instead of
> @sources.redhat.com?  sources.redhat.com no longer works.
> 
> >   Ok to commit?  
> 
> OK, thanks.

  Overseers@sourceware.org just help to resolve my account issue.  I have checked in
both the GAS patch and new tests.  Thanks a lot!

Regards,
Chao-ying