Version bump to SD1A.210817.036.A2 [core/build_id.mk]

Change-Id: Ieb09ef459fa8847edc5163a87f0bf145fa8a7e07
diff --git a/core/build_id.mk b/core/build_id.mk
index e0b39e6..b0347bf 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=SD1A.210817.036.A1
+BUILD_ID=SD1A.210817.036.A2