Relicense IBM portions of resolv/base64.c resolv/res_debug.c.

This change relicenses the IBM portions of resolv/base64.c and
resolv/res_debug.c to a new license that does not have use-limited
patent language.  The top-level LICENSE file is updated with the
license.

The relicensing was approved by IBM.

Signed-off-by: Brad Topol, IBM Director of Open Technologies <btopol@us.ibm.com>
Signed-off-by: Richard Fontana <rfontana@redhat.com>
Signed-off-by: Carlos O'Donell <carlos@redhat.com>