Bump build id to 8901.4.A.0028

Change-Id: I67746113670472b428dc1a140b06a62193400413
diff --git a/core/build_id.mk b/core/build_id.mk
index 42507ba..0b1be77 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.
 
-BUILD_ID=8901.4.A.0027
+BUILD_ID=8901.4.A.0028