[PATCH] Use -frounding-math for math testsuite

[David Miller]

From: Roland McGrath <roland@hack.frob.com>
Date: Mon,  7 May 2012 16:39:29 -0700 (PDT)

>> Trying to schedule these instructions is what got me into trouble in
>> the first place, so I'll take a pass on the -(1f-0b) stuff for now.
> 
> But its only their lack that makes scheduling able to cause you trouble!
> And a magic constant with a big comment is always inferior to intricate
> symbolic arithmetic with an ever bigger comment!

I'm trying to avoid having to go and audit every user of these macros,
and their users, and so on and so forth, to make sure I don't use
local labels that conflict with ones that they use.

This bug has already consumed my entire day, and I know that even
after I commit this fix I have sparc ULPs to update and other details
to attend to.

So I'm sticking with my intended fix, thanks.