core: Dont overwrite build.prop when TARGET_COPY_OUT_VENDOR=system

Change-Id: I416c0e8e0c3788b088b0c72c4483a78d2c80be4e

core/Makefile

@@ -337,6 +337,8 @@ endif
 # -----------------------------------------------------------------
 # vendor build.prop
 #
+# Prevent overwriting build.prop in system
+ifneq ($(TARGET_COPY_OUT_VENDOR),system)
 # For verifying that the vendor build is what we think it is
 INSTALLED_VENDOR_BUILD_PROP_TARGET := $(TARGET_OUT_VENDOR)/build.prop
 ALL_DEFAULT_INSTALLED_MODULES += $(INSTALLED_VENDOR_BUILD_PROP_TARGET)
@@ -385,6 +387,7 @@ ifdef property_overrides_split_enabled
 		echo "$(line)" >> $@;)
 	$(hide) build/tools/post_process_props.py $@
 endif  # property_overrides_split_enabled
+endif  # TARGET_COPY_OUT_VENDOR=system
 
 # ----------------------------------------------------------------