Bug 1481802 - Disable test_form_submission.html on Linux64 for frequent failures. r=intermittent-reviewers,jmaher DONTBUILD

Differential Revision: https://phabricator.services.mozilla.com/D132616

toolkit/components/satchel/test/mochitest.ini

@@ -18,6 +18,7 @@ skip-if = (verify && debug && (os == 'win')) || (os == 'mac') # Bug 1514249
 [test_form_submission.html]
 skip-if =
   os == "mac" && bits == 64 && debug # Bug 1481802
+  os == 'linux' && bits == 64 && tsan # Bug 1481802
 [test_form_submission_cap.html]
 [test_form_submission_cap2.html]
 [test_input_valid_state_with_autocomplete.html]