k_sinl bug fix for ldbl-128 and ldbl-128ibm

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Fri, 16 Mar 2012 12:02:07 +0000 (UTC)

> On Thu, 15 Mar 2012, David Miller wrote:
> 
>> This gives new ULPs on sparc, this is test-ldouble.out:
> 
> Hopefully it also reduces some ULPs (which is less visible) so being on 
> average better (as was the case when making this fix for ldbl-96).

Fair enough.