Add two new supplemental properties for chromeperf data.

  a_jobname: uniquely identifies the job in the autotest system
                so logs from the job run can be linked.
  a_variant_name: the variant name so it can be retrieved without
                  parsing the platform name.

BUG=chromium:584053

TEST=Ran unit tests in local client, ran end to end test on local
Autotest instance.

Change-Id: Ifd09d29df73fa689bcfb355d74321fc45b44f0ee
Reviewed-on: https://chromium-review.googlesource.com/326471
Commit-Ready: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Matt Sheets <msheets@chromium.org>
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Reviewed-by: Dan Shi <dshi@google.com>
diff --git a/tko/parse.py b/tko/parse.py
index 0b287b9..0ecf248 100755
--- a/tko/parse.py
+++ b/tko/parse.py
@@ -281,7 +281,7 @@
 
     # Upload perf values to the perf dashboard, if applicable.
     for test in job.tests:
-        perf_uploader.upload_test(job, test)
+        perf_uploader.upload_test(job, test, jobname)
 
     # Although the cursor has autocommit, we still need to force it to commit
     # existing changes before we can use django models, otherwise it