sepolicy: Start CM Common sepolicy

Rather than having to maintain out of tree changes, it is often
easier to maintain a hiearchy of changes, starting with the vendors
common config file. From there, inheriting products can pick up a base
and start to add or remove certain bits from it, making use of the
BOARD_SEPOLICY_* functions documented in external/sepolicy/README.

Change-Id: I28a4aaf6c126535f0a88001582641b234a750015
diff --git a/config/common.mk b/config/common.mk
index 22be0b7..36584f2 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -259,5 +259,5 @@
   ro.cm.version=$(CM_VERSION) \
   ro.modversion=$(CM_VERSION)
 
-
+-include vendor/cm/sepolicy/sepolicy.mk
 -include $(WORKSPACE)/hudson/image-auto-bits.mk