libsepol: support policy modules when roletrans rules not supported

Although the role trans code had support to handle the kernel policy
when the version was less that roletrans such support was not in the
module read/write code.  This patch adds proper support for role trans
in modules.

Signed-off-by: Eric Paris <eparis@redhat.com>
Signed-off-by: Steve Lawrence <slawrence@tresys.com>
2 files changed