Version bump to NKG47M

Change-Id: I23ff32b28c29c3cb529391e0392a522f25e22716
diff --git a/core/build_id.mk b/core/build_id.mk
index cfdeeb7..ef2649f 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=NKG47L
+export BUILD_ID=NKG47M