Version bump to RP1A.200131.003 [core/build_id.mk]

Change-Id: I7ed762edec68e70de8250705f0d7e1c000876784
diff --git a/core/build_id.mk b/core/build_id.mk
index 31f429b..bb0696a 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=RP1A.200131.002
+BUILD_ID=RP1A.200131.003