[MacPorts] #59342: cctools @921_3+llvm70: uses incorrect SDK taken from llvm-config-mp-7.0

[MacPorts]

#59342: cctools @921_3+llvm70: uses incorrect SDK taken from llvm-config-mp-7.0
----------------------------------+----------------------
  Reporter:  thomasrussellmurphy  |      Owner:  jeremyhu
      Type:  defect               |     Status:  assigned
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:  2.6.1
Resolution:                       |   Keywords:
      Port:  cctools llvm-7.0     |
----------------------------------+----------------------
Changes (by EJFielding):

 * Attachment "main.log" added.

 main log showing failure to build

-- 
Ticket URL: <https://trac.macports.org/ticket/59342>
MacPorts <https://www.macports.org/>
Ports system for macOS