[libiberty] Move to GFDL 1.3

[Ian Lance Taylor]

Gerald Pfeifer <gerald@pfeifer.com> writes:

> 2010-06-13  Gerald Pfeifer  <gerald@pfeifer.com>
>
> 	* libiberty.texi: Remove reference to GCC 3 and 2001 (thrice).
> 	Update copyright years.
> 	Move to GFDL 1.3.

This is OK.

Thanks.

Ian