Default profile usage based on the existence of the profile

Currently this only checks vendor/google_data/art_profile, but the plan
is to use a per product directory in the near future.

(cherry picked from commit 6324c2d29133ccaf8230f663251e1f3305a1d66d)

Bug: 38032017
Test: make and make sure the profile was used (calculator).

Merged-In: I8de6484dbcac5fc040ad70f97e97d193b317af8c
Change-Id: I8de6484dbcac5fc040ad70f97e97d193b317af8c
diff --git a/core/product.mk b/core/product.mk
index c5ddf81..070986b 100644
--- a/core/product.mk
+++ b/core/product.mk
@@ -123,6 +123,7 @@
     PRODUCT_DEX_PREOPT_MODULE_CONFIGS \
     PRODUCT_DEX_PREOPT_DEFAULT_FLAGS \
     PRODUCT_DEX_PREOPT_BOOT_FLAGS \
+    PRODUCT_DEX_PREOPT_PROFILE_DIR \
     PRODUCT_SANITIZER_MODULE_CONFIGS \
     PRODUCT_SYSTEM_BASE_FS_PATH \
     PRODUCT_VENDOR_BASE_FS_PATH \