package/libkrb5: bump to 1.17

The hash of the NOTICE file has changed due to:

 - Update in copyright year

 - Rewrapping/indentation changes

 - Addition of the license for other parts of the software, but that
   are under MIT, so no change from that perspective

Signed-off-by: André Hentschel <nerv@dawncrow.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>