Add a product variable for priv-apps dependencies.

Those dependencies are jars/apks on which we want to
uncompress their dexs.

bug: 30972906
bug: 63920015

Test: sailfish build

Change-Id: Ic96ffe9dbe39abc1c28e7de134892d689207c9ca
diff --git a/core/product.mk b/core/product.mk
index cf62283..8619f63 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -116,6 +116,7 @@
     PRODUCT_SYSTEM_SERVER_APPS \
     PRODUCT_SYSTEM_SERVER_JARS \
     PRODUCT_DEXPREOPT_SPEED_APPS \
+    PRODUCT_LOADED_BY_PRIVILEGED_MODULES \
     PRODUCT_VBOOT_SIGNING_KEY \
     PRODUCT_VBOOT_SIGNING_SUBKEY \
     PRODUCT_VERITY_SIGNING_KEY \