I believe sec-policy/selinux-entropyd is supposed to provide SELinux rules for the various entropyd daemons. However, sys-apps/timer_entropyd-0.2 seems to be missing in the list - it provides no IUSE=selinux. Reproducible: Always
+ 15 Jul 2015; Jason Zaman <perfinion@gentoo.org> timer_entropyd-0.2.ebuild: + RDEP on SELinux policy bug 552762