tracing: Record process and thread names into the trace

Change-Id: Iccd097d7d156b8f7f781fbddba60b914c70e174b
diff --git a/CHANGELOG b/CHANGELOG
index 36fca95..901fd17 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -9,6 +9,7 @@
     * Use process start time hashed with the process id as a unique process
       identifier, allowing multiple independent users of the SDK in the same
       process to interleave their events on shared tracks.
+    * Record process and thread names into the trace.
 
 
 v12.1 - 2021-02-01: