[MacPorts] #53873: tbb: update to 2017 Update 5

[MacPorts]

#53873: tbb: update to 2017 Update 5
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 Reporter:  lpsinger  |      Owner:  sean@…
     Type:  update    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:            |       Port:  tbb
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 Update tbb to the latest version, 2017 Update 5.

 * The project is on GitHub, so we use the GitHub portgroup to simplify the
 download, extract, and livecheck phases.
 * The versioning scheme has changed: Intel calls the latest version "2017
 Update 5", or "2017_U5".

 See [[https://github.com/macports/macports-ports/pull/393|pull request
 #393 on GitHub]].

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Ticket URL: <https://trac.macports.org/ticket/53873>
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