Make-lang.in: Change copyright header to refer to version 3 of the GNU General Public...

Make-lang.in: Change copyright header to refer to version 3 of the GNU General Public License...

* Make-lang.in: Change copyright header to refer to version 3 of the GNU
  General Public License and to point readers at the COPYING3 file and
  the FSF's license web page.
* ada-tree.def, nmake.adt, nlists.h, snames.h, utils.c,
  Makefile.rtl, Makefile.in, config-lang.in, uintp.h, urealp.h,
  namet.h, decl.c, utils2.c, lang.opt, elists.h, atree.h, types.h,
  treeprs.adt, lang-specs.h, cuintp.c, stringt.h, gnatbl.c: Likewise.

From-SVN: r128038