python-pyasn1: add 0.1.7

python-pyasn1 is required by python-cryptography

Copied directly from:
http://git.yoctoproject.org/cgit/cgit.cgi/meta-cloud-services/tree/meta-openstack/recipes-devtools/python/python-pyasn1_0.1.7.bb



Original author: Bruce Ashfield <bruce.ashfield@windriver.com>

Signed-off-by: Tim Orling <TicoTimo@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>