acosl..tanl: Relicense under LGPL.

acosl..tanl: Relicense under LGPL.

* modules/acosl (License): Change to LGPL.
* modules/asinl (License): Likewise.
* modules/atanl (License): Likewise.
* modules/cosl (License): Likewise.
* modules/expl (License): Likewise.
* modules/logl (License): Likewise.
* modules/sinl (License): Likewise.
* modules/sqrtl (License): Likewise.
* modules/tanl (License): Likewise.
Source code originally from glibc and Paolo Bonzini. Agreements:
<http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00137.html>
<http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00128.html>