Make jail ``jname`` pkgng aware

    CLI Example:

    .. code-block:: bash

        salt '*' poudriere.make_pkgng_aware <jail name>

def make_pkgng_aware(jname):
    '''
    Make jail ``jname`` pkgng aware

    CLI Example:

    .. code-block:: bash

        salt '*' poudriere.make_pkgng_aware <jail name>
    '''
    ret = {'changes': {}}
    cdir = _config_dir()
    # ensure cdir is there
    if not os.path.isdir(cdir):
        os.makedirs(cdir)
        if os.path.isdir(cdir):
            ret['changes'] = 'Created poudriere make file dir {0}'.format(cdir)
        else:
            return 'Could not create or find required directory {0}'.format(
                    cdir)

    # Added args to file
    __salt__['file.write']('{0}-make.conf'.format(os.path.join(cdir, jname)), 'WITH_PKGNG=yes')

    if os.path.isfile(os.path.join(cdir, jname) + '-make.conf'):
        ret['changes'] = 'Created {0}'.format(
                os.path.join(cdir, '{0}-make.conf'.format(jname))
                )
        return ret
    else:
        return 'Looks like file {0} could not be created'.format(
                os.path.join(cdir, jname + '-make.conf')
                )