Update web-platform-tests expected data to revision 6dc0391257a1666a90f66c8da193b43cd9c60dcb

--HG--
rename : testing/web-platform/meta/workers/semantics/run-a-worker/003.html.ini => testing/web-platform/meta/html/semantics/embedded-content/media-elements/track/track-element/cors/003.html.ini
rename : testing/web-platform/meta/html/syntax/parsing/html5lib_tests19.html.ini => testing/web-platform/meta/html/syntax/parsing/html5lib_plain-text-unsafe.html.ini
rename : testing/web-platform/meta/proximity/ProximityEvent_tests.html.ini => testing/web-platform/meta/proximity/DeviceProximityEvent_tests.html.ini
rename : testing/web-platform/meta/ambient-light/AmbientLight_tests.html.ini => testing/web-platform/meta/proximity/UserProximityEvent_tests.html.ini
rename : testing/web-platform/meta/2dcontext/the-canvas-state/2d.state.saverestore.shadowColor.html.ini => testing/web-platform/meta/webaudio/the-audio-api/the-gainnode-interface/test.html.ini
Disable an unstable test.
Update web-platform-tests to revision 7a53a49e4ad0f9d34680b2ba08af31cf62eaf103
Update web-platform-tests expected data to revision 7a53a49e4ad0f9d34680b2ba08af31cf62eaf103
Enable stackwalk binary configuration for mozharness.
Update web-platform-tests to revision 8203b365c308c430eea1aadc3ca021e30958d9a4