[MacPorts] #59332: bazel26 fails to build

[MacPorts]

#59332: bazel26 fails to build
----------------------+--------------------------
  Reporter:  gjaeger  |      Owner:  RootFunction
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.1
Resolution:           |   Keywords:  catalina
      Port:  bazel26  |
----------------------+--------------------------

Comment (by gjaeger):

 I use Xcode 11.1 (11A1027) and i have fully updated the CLTs. `xcode-
 select -p`points to the correct Xcode installation
 (''/Applications/Xcode.app/Contents/Developer'').


 {{{
 ---> Building bazel26
 Error: Failed to build bazel26: command execution failed
 }}}

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Ticket URL: <https://trac.macports.org/ticket/59332#comment:3>
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