Update product config with BRILLO_PRODUCT_ID

The new method of setting the product ID is to set the
BRILLO_PRODUCT_ID field, which sets the /etc/os-release.d file.

Change-Id: I13db71b0765006b06d0d2e06716342efd937c266

ledflasher.mk

@@ -31,9 +31,10 @@ PRODUCT_COPY_FILES += \
 
 BOARD_SEPOLICY_DIRS := $(BOARD_SEPOLICY_DIRS) $(LOCAL_PATH)/sepolicy
 
+BRILLO_PRODUCT_ID := developer-boards:brillo-starter-board-qualcomm
+
 # Adds some product specific properties.
 # * ro.product.build_target_id is the id of this project, used by the backends
 #   to route metrics/crash reports to the right customer.
 PRODUCT_PROPERTY_OVERRIDES += \
-  ro.product.product_id=developer-boards:brillo-starter-board-qualcomm \
   crash_reporter.server=https://clients2.google.com/bc/report \