Linux 4.4.221

BugLink: https://bugs.launchpad.net/bugs/1878098Signed-off-by: Ian May <ian.may@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

Makefile

 VERSION = 4
 PATCHLEVEL = 4
-SUBLEVEL = 220
+SUBLEVEL = 221
 EXTRAVERSION =
 NAME = Blurry Fish Butt