Linux 4.4.218

BugLink: https://bugs.launchpad.net/bugs/1873852Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kelsey Skunberg <kelsey.skunberg@canonical.com>

Makefile

 VERSION = 4
 PATCHLEVEL = 4
-SUBLEVEL = 217
+SUBLEVEL = 218
 EXTRAVERSION =
 NAME = Blurry Fish Butt