Make change and version bump to N4F27J

Change-Id: I133e3284caa3a9e8d196a11d3bc12494f1d0a2b9
diff --git a/core/build_id.mk b/core/build_id.mk
index 1a21eab..4d71a97 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=N4F27I
+export BUILD_ID=N4F27J