Add mac_permissions.xml file.

This was moved from external/mac-policy.git

Android.mk

@@ -100,6 +100,18 @@ LOCAL_MODULE_PATH := $(TARGET_OUT_EXECUTABLES)
 
 include $(BUILD_PREBUILT)
 
+##################################
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := mac_permissions.xml
+LOCAL_MODULE_CLASS := ETC
+LOCAL_MODULE_TAGS := optional
+LOCAL_MODULE_PATH := $(TARGET_OUT_ETC)/security
+
+LOCAL_SRC_FILES := $(LOCAL_MODULE)
+
+include $(BUILD_PREBUILT)
+
 ##################################
 
 endif #ifeq ($(HAVE_SELINUX),true)