Fixup union sepolicy

This change solve two issue:
1) Policies related to recovery should be only included in recovery
policy
2) In CM trees the sepolicy dir was always bootable/recovery-
twrp/sepolicy, even if recovery path was bootable/recovery

Change-Id: I9466d22293074ba5f5240abe8b97a5d1bf30982d
diff --git a/Android.mk b/Android.mk
index 9dc31a5..47c4aa1 100644
--- a/Android.mk
+++ b/Android.mk
@@ -17,7 +17,7 @@
 ifdef project-path-for
     ifeq ($(LOCAL_PATH),$(call project-path-for,recovery))
         PROJECT_PATH_AGREES := true
-        BOARD_SEPOLICY_DIRS += bootable/recovery-twrp/sepolicy
+        BOARD_SEPOLICY_DIRS += $(call project-path-for,recovery)/sepolicy
     endif
 else
     ifeq ($(LOCAL_PATH),bootable/recovery)