Version bump to PD1A.180720.030

Change-Id: If6ff1dc786d2f3f940a2a33f04b89679a1c36725
diff --git a/core/build_id.mk b/core/build_id.mk
index b6a7f4f..d269624 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.180720.029
+export BUILD_ID=PD1A.180720.030