Version bump to PPB1.181017.002

Change-Id: Ie0cc915e0fa031204167ead265ede862ca463045
diff --git a/core/build_id.mk b/core/build_id.mk
index c2a0101..8ee7be6 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=PPB1.181017.001
+export BUILD_ID=PPB1.181017.002