security/py-rsa: Update to 3.3 (Fixes CVE-2016-1494)

• Update PORTVERSION and distinfo checksum (3.3)
• Modernize TEST entries (test target, TEST_DEPENDS, et al)
• Update setup.py patch (zip_safe no longer needed)
• Add LICENSE_FILE
• Enable NO_ARCH

This version fixed a security vulnerability:

https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-1494

PR: 206746
Reported by: Sevan Janiyan <venture37 geeklan co.uk>
Security: e78bfc9d-cb1e-11e5-b251-0050562a4d7b
Security: CVE-2016-1494
MFH: 2016Q1