package/tpm2-tools: add SELinux module

Support for tpm2-tools is added by the services/tpm2 module in the
SELinux refpolicy.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>