[MacPorts] #62706: OpenCOLLADA build failure on macOS 11

[MacPorts]

#62706: OpenCOLLADA build failure on macOS 11
--------------------------+--------------------
  Reporter:  gallafent    |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.6.4
Resolution:               |   Keywords:
      Port:  opencollada  |
--------------------------+--------------------

Comment (by jasonliu--):

 I just found some patches that the Blender devs implemented to allow
 OpenCOLLADA to compile on arm64. Based on the submitted build log, it
 looks like the same errors are occurring on macOS 11 x86_64.

 https://github.com/blender/blender/commit/9715ad5acad9a42b65efd64b6c7fbe157f949bfb

 (specifically, the section that makes additions to
 `build_files/build_environment/patches/opencollada.diff`)

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Ticket URL: <https://trac.macports.org/ticket/62706#comment:2>
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