bind: bump version to bugfix release 9.11.1-P3

bind: bump version to bugfix release 9.11.1-P3

BIND 9.11.1-P3 addresses a TSIG regression introduced in the 9.11.1-P2
security bump:

https://lists.isc.org/pipermail/bind-announce/2017-July/001057.html

Also add a hash for the license file while we're at it.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit c237f1d1c5447af3b967304d7929cf115ea1aa5d)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>