add initial archlinux support

[bastelfreak]

I tested this on my own Arch box. I only needed to restructure the params.pp to make it work. I'm happily using this profile:

class {'::influxdb::server':
  reporting_disabled  => false,
  collectd_options    => {
    enabled       => true,
    bind-address  => ':25826',
    database      => 'collectd_db',
    typesdb       => '/usr/share/collectd/types.db',
    batch-size    => 1000,
    batch-pending => 5,
    batch-timeout => '1s',
    read-buffer   => 0,
  },  
}

[dgolja]

tnx ... Merging it