- python3: deliver files to INSTDIR, with same layout as instset
  and do not deliver .lib files
- pyuno: remove obsolete python.bin targets
- pyuno: remove usage of CustomTarget_zip for WNT and non-Mac UNX
  platforms (sadly it is apparently still needed for "system" python on
  MinGW)
- scp2: use the python3 filelist
  There is still a problem here because the installer does not currently
  allow to preserve the executable bit on files in a filelist
- RepositoryExternal: run python executable from INSTDIR
  and link against libraries in UnpackedTarball dir

Change-Id: I931ca0a8be6ff40051b1ca50da1f0770e6057832
Reviewed-on: https://gerrit.libreoffice.org/3525Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>