selinux: ensure av_permissions.h is built when needed
The Makefile rule responsible for building flask.h and
av_permissions.h only lists flask.h as a target which means that
av_permissions.h is only generated when flask.h needs to be
generated. This patch fixes this by adding av_permissions.h as a
target to the rule.
Fixes: 8753f6bec352 ("selinux: generate flask headers during kernel build") Signed-off-by: Paul Moore <paul@paul-moore.com>