sepolicy: allow userinit to set its property

Change-Id: I9d8270d889566d169077a1b1fdaee43059d11ee1
diff --git a/sepolicy/sepolicy.mk b/sepolicy/sepolicy.mk
index 6cd5064..194fd9a 100644
--- a/sepolicy/sepolicy.mk
+++ b/sepolicy/sepolicy.mk
@@ -32,6 +32,7 @@
     system_app.te \
     ueventd.te \
     uncrypt.te \
+    userinit.te \
     vold.te \
     zygote.te \
     mac_permissions.xml