[tor-bugs] #25420 [Applications/Tor Browser]: Update gcc to 6.4.0 (Windows)

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#25420: Update gcc to 6.4.0 (Windows)
-------------------------------------------------+-------------------------
 Reporter:  boklm                                |          Owner:  tbb-
                                                 |  team
     Type:  task                                 |         Status:
                                                 |  needs_review
 Priority:  High                                 |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-rbm, boklm201804,                |  Actual Points:
  TorBrowserTeam201804R                          |
Parent ID:  #24631                               |         Points:
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------
Changes (by boklm):

 * status:  new => needs_review
 * keywords:  tbb-rbm, boklm201804, TorBrowserTeam201804 => tbb-rbm,
     boklm201804, TorBrowserTeam201804R


Comment:

 The 3 `tor-browser.git` patches that we need for updating gcc to 6.4.0
 are:
 https://gitweb.torproject.org/user/boklm/tor-browser-
 build.git/plain/projects/firefox/bug_25420.patch?h=bug_25420_v3&id=22e870aeb3dbcb0151faef59105560742f184673
 https://gitweb.torproject.org/user/boklm/tor-browser-
 build.git/plain/projects/firefox/bug_25420_2.patch?h=bug_25420_v3&id=22e870aeb3dbcb0151faef59105560742f184673
 https://gitweb.torproject.org/user/boklm/tor-browser-
 build.git/plain/projects/firefox/bug_25420_3.patch?h=bug_25420_v3&id=22e870aeb3dbcb0151faef59105560742f184673

 And the `tor-browser-build` patch:
 https://gitweb.torproject.org/user/boklm/tor-browser-
 build.git/commit/?h=bug_25420_v3&id=0dc79fe9d7473b7657addd50a4631bf6d4ad588f

 I have been able to do reproduce Windows 32 and 64 builds on two machines,
 and those builds are running without error in my Windows VM.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25420#comment:11>
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