Version bump to SD1A.210817.036.A7 [core/build_id.mk]

Change-Id: I1a34ef96223142b612a83c0622518dc2b6e5f1a3
diff --git a/core/build_id.mk b/core/build_id.mk
index eea5116..9dac8b8 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.A6
+BUILD_ID=SD1A.210817.036.A7