Version bump to SSV1.210916.028 [core/build_id.mk]

Change-Id: Icfa791ab5d78079c6d16b3669663247c4cf4d31a
diff --git a/core/build_id.mk b/core/build_id.mk
index 5381cb2..223d429 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=SSV1.210916.027
+BUILD_ID=SSV1.210916.028