buildroot

libnspr: bump version to 4.17

libnss 3.33 needs libnspr >= 4.17.

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 b1363093248b6198eab285124b2c87411155a0a1)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>