mpc-cli: set mainProgram

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

+1
+1
pkgs/applications/audio/mpc/default.nix
··· 58 license = licenses.gpl2Plus; 59 maintainers = with maintainers; [ AndersonTorres ]; 60 platforms = with platforms; unix; 61 }; 62 }
··· 58 license = licenses.gpl2Plus; 59 maintainers = with maintainers; [ AndersonTorres ]; 60 platforms = with platforms; unix; 61 + mainProgram = "mpc"; 62 }; 63 }