Version bump to PD2A.181108.004

Change-Id: Ib291d13ac38e5bf66b4e84834deffced8370c19f
diff --git a/core/build_id.mk b/core/build_id.mk
index cbfcac8..f59f232 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=PD2A.181108.003
+export BUILD_ID=PD2A.181108.004