Updating the BUILD_ID to OC-DR1 for oc-dr1-dev branch.

Bug: None
Test: Build and flashed AIO device
Change-Id: I53047dbc0b89c2b3afe5d2af3c0532968f60b893
Merged-In: I796d7490f39f817af8f2ec5bea86593182bfcbe2
diff --git a/core/build_id.mk b/core/build_id.mk
index 0e8e2cf..00272aa 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=MASTER
+export BUILD_ID=OC-DR1