Version bump to PD1A.180620.001

Change-Id: I2c0279941bfd9d18a0b77befe4896d53081f689d
diff --git a/core/build_id.mk b/core/build_id.mk
index 394125e..8eaa6ad 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.180619.001
+export BUILD_ID=PD1A.180620.001