vcpkg/ports/keystone, branch 2020.06

vcpkg/ports/keystone, branch 2020.06 Forked from https://github.com/microsoft/vcpkg Add keystone port (#3273) 2018-05-18T17:10:16+00:00 Alexandro Sanchez alexaltea123@gmail.com 2018-05-18T17:10:16+00:00 b68da8a9dc122533d51db9661e9c9ec2fad86794 * Add keystone port * [keystone] Small portfile simplifications

* Add keystone port

* [keystone] Small portfile simplifications