DO NOT MERGE  Designate tm-dev* branches as TM.

BUG:218719100

Change-Id: I3880438a8af16cfe559f4469e160f7a80281f163
diff --git a/core/build_id.mk b/core/build_id.mk
index 2f9c3f3..a489788 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=MASTER
+BUILD_ID=TM