Version bump to RP1A.191218.002 [core/build_id.mk]

Change-Id: I53081104012d8c3e09e715695b38cf3e34f7992c
diff --git a/core/build_id.mk b/core/build_id.mk
index 0c989f8..733b9a6 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.191218.001
+BUILD_ID=RP1A.191218.002