python-pyopenssl: upgrade 0.13 -> 0.15.1

* Dropped x509_revoked_dup.patch,since the original file crl.c does not exist anymore.
* Add DEPENDS python-cryptography to aviod build errors:
  | error: Could not find suitable distribution for Requirement.parse('six>=1.5.2')
  | ERROR: python setup.py install execution failed.

Signed-off-by: Li Xin <lixin.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>