Version bump to QD1A.190821.014.C2 [core/build_id.mk]

Change-Id: I20605e3600e502093642472f50afb839aec7a8ff
diff --git a/core/build_id.mk b/core/build_id.mk
index 211476d..1cfcdb8 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=QD1A.190821.014.C1
+BUILD_ID=QD1A.190821.014.C2