Bug 945222 - Update web-platform-tests expected data to revision 884e400332e6f8b18700d9e907c322c16f46fc52

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rename : testing/web-platform-tests/metadata/workers/semantics/xhr/001.html.ini => testing/web-platform-tests/metadata/websockets/security/001.html.ini
Update for new marionette API
Fix mach reduce command
Try to be better at waiting for B2G device readiness
Bug 945222 - Update web-platform-tests to revision 5aaa5ebe36b56655eef9641dea8ff16afab35983
Allow stable tests to be filtered as well.
Fix handling of EOFError
Bug 945222 - Update web-platform-tests to revision 5db3fd6ab98c6cc9fd02d2ab3fda6e16516b2a6d
Bug 945222 - Update web-platform-tests expected data to revision 5db3fd6ab98c6cc9fd02d2ab3fda6e16516b2a6d
Improve unstable test output
Fix comment
Update wptrunner version