Version bump to QPR1.180402.001

Change-Id: Id7802e5b532caf32d381cd68b16d06578adbc618
diff --git a/core/build_id.mk b/core/build_id.mk
index 4b7fe92..2308a9a 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=QPR1.180401.001
+export BUILD_ID=QPR1.180402.001