Release systrace into platform-tools

Change-Id: Id05c92f96ecb38c5a056d51ba86ea2e91a45733d
diff --git a/build/sdk.atree b/build/sdk.atree
index 6cb6967..bd6831a 100644
--- a/build/sdk.atree
+++ b/build/sdk.atree
@@ -48,6 +48,17 @@
 # API database for tools such as lint
 development/sdk/api-versions.xml              platform-tools/api/api-versions.xml
 
+# systrace
+external/chromium-trace/systrace.py           platform-tools/systrace/systrace.py
+external/chromium-trace/systrace-legacy.py    platform-tools/systrace/systrace-legacy.py
+external/chromium-trace/script.js             platform-tools/systrace/script.js
+external/chromium-trace/style.css             platform-tools/systrace/style.css
+external/chromium-trace/prefix.html           platform-tools/systrace/prefix.html
+external/chromium-trace/suffix.html           platform-tools/systrace/suffix.html
+external/chromium-trace/LICENSE               platform-tools/systrace/LICENSE
+external/chromium-trace/AUTHORS               platform-tools/systrace/AUTHORS
+external/chromium-trace/NOTICE                platform-tools/systrace/NOTICE
+external/chromium-trace/UPSTREAM_REVISION     platform-tools/systrace/UPSTREAM_REVISION
 
 ##############################################################################
 # Build Tools Component