Bug#918287: linux-patch-grsecurity2 build depends on dh-kpatches that is currently not in buster

[Adrian Bunk]

Source: linux-patch-grsecurity2
Version: 3.1+4.9.11-201702181444-1
Severity: serious
Tags: ftbfs
Control: block -1 by 876892

linux-patch-grsecurity2 build depends on dh-kpatches
that is currently not in buster due to #876892.