Version bump to PPB1.181007.002

Change-Id: Ic9dcf643956d010983ec5bebc8863a7545df3a70
diff --git a/core/build_id.mk b/core/build_id.mk
index 376d3ea..ec78db9 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=PPB1.181007.001
+export BUILD_ID=PPB1.181007.002