[Merge] unity:fix-std-tuple-use into unity:master

[Dmitry Shachnev]

With https://code.launchpad.net/~unity-team/unity/+git/unity/+merge/361372 the tests passed on all architectures, so I am approving and landing this.
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https://code.launchpad.net/~unity-team/unity/+git/unity/+merge/359970
Your team Unity Team is requested to review the proposed merge of unity:fix-std-tuple-use into unity:master.