Make change and version bump to RP1A.190620.001

Change-Id: Id7bce1537d3a57793b72f8076f0b6dbe81460702
diff --git a/core/build_id.mk b/core/build_id.mk
index 2f9c3f3..ac139a2 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.
 
-BUILD_ID=MASTER
+BUILD_ID=RP1A.190620.001