[MacPorts] #41357: nodejs: set python dynamically in v8.gyp, or else the build fails

[MacPorts]

#41357: nodejs: set python dynamically in v8.gyp, or else the build fails
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 Reporter:  royliu@…  |      Owner:  ciserlohn
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:  2.2.1
 Keywords:            |       Port:  nodejs
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 My default Python version is set to 3.3, and this messes up the v8 build.
 Please find attached a patch that fixes this.

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Ticket URL: <https://trac.macports.org/ticket/41357>
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