Version bump to PD1A.180720.009

Change-Id: I46a8373e698dc7ca641a96c49cf8658d24ea9c9b
diff --git a/core/build_id.mk b/core/build_id.mk
index bca6d77..5811505 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=PD1A.180720.008
+export BUILD_ID=PD1A.180720.009