Adds telemetry files to exclusion list

This way any changes to these files trigger a full build/test run.

BUG=383609
TEST=none
R=tonyg@chromium.org

Review URL: https://codereview.chromium.org/409213003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284838 0039d316-1c4b-4281-b951-d872f2087c98

testing/buildbot/chromium_trybot.json

@@ -197,6 +197,8 @@
     "content/test/data/.*",
     "DEPS",
     "testing/buildbot/.*",
+    "tools/perf/.*",
+    "tools/telemetry/.*",
     "tools/whitespace.txt"
   ],