[tor-bugs] #20929 [Applications/Tor Browser]: Bump GCC version in our alpha builds

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#20929: Bump GCC version in our alpha builds
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 Reporter:  gk                                   |          Owner:  tbb-
                                                 |  team
     Type:  enhancement                          |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-gitian, TorBrowserTeam201707R,   |  Actual Points:
  GeorgKoppen201707                              |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by gk):

 FWIW https://bugzilla.mozilla.org/show_bug.cgi?id=1305396 is a non-issue
 anymore after we switched to esr52. Not sure which change fixed it,
 though.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20929#comment:7>
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