[tor-bugs] #34011 [Applications/Tor Browser]: Bump clang version to 9.0.1

[Tor Bug Tracker & Wiki]

#34011: Bump clang version to 9.0.1
-------------------------------------+-------------------------------------
     Reporter:  gk                   |      Owner:  tbb-team
         Type:  defect               |     Status:  new
     Priority:  Medium               |  Milestone:
    Component:  Applications/Tor     |    Version:
  Browser                            |   Keywords:  tbb-mobile, tbb-rbm,
     Severity:  Normal               |  TorBrowserTeam202004
Actual Points:                       |  Parent ID:  #33626
       Points:                       |   Reviewer:
      Sponsor:                       |
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 Let's go away from clang 8.0.1

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34011>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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