Issue #44: Permissive build boots w/SELinux disabled

    Output from sestatus changed from RHEL6 -> RHEL7.
    Parse output for loaded policy name to put in /etc/selinux/config
    when doing Permissive build. Otherwise system doesn't know path
    to policy and boots w/SELinux disabled.
Merge pull request #46 from tomhurd/master

Issue #44: Permissive build boots w/SELinux disabled