Version bump to NJH47F

Change-Id: I5e1344e333421f85364602fe3ba44879d00bfd73
diff --git a/core/build_id.mk b/core/build_id.mk
index 869db10..35b5a1b 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=NJH47E
+export BUILD_ID=NJH47F