Apply m4 to file_contexts and property_contexts to support includes.
diff --git a/Android.mk b/Android.mk
index ee1a931..68f4c69 100644
--- a/Android.mk
+++ b/Android.mk
@@ -53,7 +53,7 @@
file_contexts := $(intermediates)/file_contexts
$(file_contexts): $(LOCAL_PATH)/file_contexts $(LOCAL_POLICY_FC)
@mkdir -p $(dir $@)
- $(hide) cat $^ > $@
+ $(hide) m4 -s $^ > $@
file_contexts :=
##################################
@@ -80,7 +80,7 @@
property_contexts := $(intermediates)/property_contexts
$(property_contexts): $(LOCAL_PATH)/property_contexts $(LOCAL_POLICY_PC)
@mkdir -p $(dir $@)
- $(hide) cat $^ > $@
+ $(hide) m4 -s $^ > $@
property_contexts :=
##################################