Version bump to OSN1.210329.004 [core/build_id.mk]

Change-Id: Iaf0c26b183a57579fbbcdb3048d2d7d5fcc626da
diff --git a/core/build_id.mk b/core/build_id.mk
index fbfd217..14df857 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=OSN1.210329.003
+export BUILD_ID=OSN1.210329.004