Version bump to OPD1.170503.007

Change-Id: I5c5cccef0804bd347562e7b49c87b5fce509eb2b
diff --git a/core/build_id.mk b/core/build_id.mk
index 3d88076..c65acce 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=OPD1.170503.006
+export BUILD_ID=OPD1.170503.007