I was not able to find any external users of pkg/selinux but kept it
for now (and marked as deprecated) so we can remove it later.
PS pkg/selinux adds go:fix directives which are not (yet) recognized
by the gocheckcompilerdirectives linter, so add a temporary exception).
Signed-off-by: Kir Kolyshkin <kolyshkin@gmail.com>