Fixed services build using dh_make on Ubuntu 16.04+
Fixed services build using dh_make on Ubuntu 16.04+

- With newer version of dh_make we can't use -i and -s options together.
  Each of them states to produce a single deb package.
  I kept "-i" since it means "single arch-independent package", while "-s" stated
  "It is the standard case, so if you don't know what to do, choose this".
- Not tested on older systems, but result should be the same.
  We want arch-independent package and it can be now only of 1 class.

Laliska/perun-services,sustr4/perun-services,CESNET/perun-services,sustr4/perun-services,zlamalp/perun-services,frhrdina/perun-services,CESNET/perun-services,frhrdina/perun-services,sustr4/perun-services,CESNET/perun-services,zlamalp/perun-services,Laliska/perun-services,Laliska/perun-services,frhrdina/perun-services,stavamichal/perun-services,stavamichal/perun-services,Laliska/perun-services,stavamichal/perun-services,zlamalp/perun-services,zlamalp/perun-services,stavamichal/perun-services,frhrdina/perun-services,CESNET/perun-services,sustr4/perun-services