Version bump to PPR1.180220.002

Change-Id: I8cd20f64ec81785487a543673eb9b293a07fdde8
diff --git a/core/build_id.mk b/core/build_id.mk
index c161005..f740398 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=PPR1.180220.001
+export BUILD_ID=PPR1.180220.002