Build: Add PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD

Add product variable that can override the ART module behavior
packing. Rules and meaning are detailed in art/Android.mk.

Bug: 62087184
Test: m
Change-Id: I88e1cb0925cf62c3951b486a178d4dfc5e888a93
diff --git a/core/product.mk b/core/product.mk
index 34cd21c..ab65ea5 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -130,6 +130,7 @@
     VENDOR_PRODUCT_RESTRICT_VENDOR_FILES \
     VENDOR_EXCEPTION_MODULES \
     VENDOR_EXCEPTION_PATHS \
+    PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD \
     PRODUCT_ART_USE_READ_BARRIER \
     PRODUCT_IOT \
     PRODUCT_SYSTEM_HEADROOM \