samba profiles: support paths used by Arch Linux

On Arch Linux rpcd_classic, rpcd_epmapper, rpcd_fsrvp, rpcd_lsad, rpcd_mdssvc, rpcd_rpcecho, rpcd_spoolss, rpcd_winreg, samba-bgqd, samba-dcerpcd and smbspool_krb5_wrapper are in /usr/lib/samba/samba/.

See https://archlinux.org/packages/extra/x86_64/samba/files/ and https://bugs.archlinux.org/task/74614.