Suppy zip as the correct extention for download in variable
PYPI_PACKAGE_EXT. Upgrade to release 3.2.1, for details have a
look at the release notes:
https://github.com/robotframework/robotframework/blob/master/doc/releasenotes/rf-3.2.1.rst
Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Acked-by: Trevor Gamblin <trevor.gamblin@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
