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

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Fri, 16 Mar 2012 00:53:19 +0000 (UTC)

> Comments?  I can do some testing if needed, but some other people may
> be more conveniently set up to test ldbl-128 and ldbl-128ibm than I
> am.  (It is of course possible that in particular cases a more
> accurate internal calculation leads to a less accurate final result
> and so some ulps baseline changes may be needed.)

I'll try to find time to give it a spin on sparc.