Make audit plugins dir used for sedispatch.conf configurable
    
    New audit version 3 moved plugins from /etc/audisp/plugins.d to
    /etc/audit/plugins.d directory. This change allows to install sedispatch plugin
    configuration file there using:
    
    ./configure --with-auditpluginsdir=/etc/audit/plugins.d
    
    See https://github.com/linux-audit/audit-userspace/commit/a5f7baf0917a60cacbd237ba1f1512db63445031