Version bump to N4F27L

Change-Id: If31d0085816d65550d4f717929a8e05b2639e74b
diff --git a/core/build_id.mk b/core/build_id.mk
index ae8b650..e6f4639 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=N4F27K
+export BUILD_ID=N4F27L