lang/python33: Fix typo in No-SSLv3 patch

• Fix typo that was introduced with the No-SSLv3 patch [1]

[1] http://svnweb.freebsd.org/changeset/ports/404347

Reported by: antoine via pkg-fallout
Reviewed by: koobs (mentor, python), antoine (python)
Approved by: koobs (mentor, python), antoine (python)
Differential Revision: https://reviews.freebsd.org/D4721