Version bump to PPR1.180423.002

Change-Id: Ibb7aaa73c5692a1dc527ef8dec242fcb70358c95
diff --git a/core/build_id.mk b/core/build_id.mk
index 96f4faa..213db59 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=PPR1.180423.001
+export BUILD_ID=PPR1.180423.002