Update product_id and product_version location.

These files are used by the update console to determine the product
associated with a given target_files.zip.

Bug: 35804180
Bug: 33211225
Test: `make dist` generates a target_files.zip with these files.
Change-Id: I6066da07d76749ae64c26d5f661c7a6d06f3fb3d
diff --git a/core/Makefile b/core/Makefile
index 9e82bfc..ff19013 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2090,8 +2090,8 @@
 	done;
 endif
 ifdef OSRELEASED_DIRECTORY
-	$(hide) $(ACP) $(TARGET_OUT_ETC)/$(OSRELEASED_DIRECTORY)/product_id $(zip_root)/META/product_id.txt
-	$(hide) $(ACP) $(TARGET_OUT_ETC)/$(OSRELEASED_DIRECTORY)/product_version $(zip_root)/META/product_version.txt
+	$(hide) $(ACP) $(TARGET_OUT_OEM)/$(OSRELEASED_DIRECTORY)/product_id $(zip_root)/META/product_id.txt
+	$(hide) $(ACP) $(TARGET_OUT_OEM)/$(OSRELEASED_DIRECTORY)/product_version $(zip_root)/META/product_version.txt
 endif
 endif
 ifeq ($(BREAKPAD_GENERATE_SYMBOLS),true)