[PATCH][ARM64] Fix predefines and add plumbing for -mfpu=

[James Molloy]

Thanks Tim,

r206390, r206394 and r206395.

> -----Original Message-----
> From: Tim Northover [mailto:t.p.northover at gmail.com]
> Sent: 16 April 2014 16:11
> To: James Molloy
> Cc: cfe-commits at cs.uiuc.edu
> Subject: Re: [PATCH][ARM64] Fix predefines and add plumbing for -mfpu=
> 
> Hi James,
> 
> > OK to commit this time?
> 
> Thanks for doing the refactoring. They look fine now.
> 
> Tim.