Fix for Python library path problem

[Hal Murray]

> 2.3) Add code to the programs to augment sys.path prior to the import. This
> would need to be in all the programs; common code in a library would suffer
> from a chicken-and-egg problem.

The step that copies python code over to $build/main/... could do minor 
edits.  There would be only one copy of the code that does that edit.

Is the install location fixed at configure time, or can that be specified at 
install time?


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