Packaging tweaks

Guillaume Paserorequested to merge
pkg_tweaks into develop

A few tweaks for packaging:

  • the otbenv scripts now check if variables PATH, PYTHONPATH and OTB_APPLICATION_PATH are not empty. The PYTHONPATH with a trailing : was causing problems with git-bash.
  • in the standalone macros, there was a missing include to GenerateExportHeaderCustom
  • in the standalone Python wrappers building scripts, we now set the RPATH during install (it is usually done by the .run script)
Edited by Guillaume Pasero

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