sysutils/py-salt: Patch module pkgng to fix pkg.clean and pkg.upgrade
These have been committed upstream:
https://github.com/saltstack/salt/commit/f70ca0f91d722647c7bf528204f56e01835ba1b9 https://github.com/saltstack/salt/commit/348342f4eb8803f3c31e8b21fd59130facb89a93
PR: 224594
Approved by: Christer Edwards (maintainer)