lirc systemd services descriptions

[Tijmen Stam / IIVQ]

For the package lirc, the systemd service file "description" lines for lirc's services don't mention the program's name. This makes scanning system.log and dmesg for problems difficult.

Suggestion:
- in /usr/lib/systemd/system/lircd.service
change the description line to add "Lirc: " to the start of the description:
Description=Lirc: Flexible IR remote input/output application support

- in /usr/lib/systemd/system/lircd-setup.service
change the description line to add "Lircd-setup: " to the start of the description:
Description=Lircd-setup: lircd(8) initialization helper tool

- in /usr/lib/systemd/system/irexec.service
change the description line to add "irexec: " to the start of the description:
Description=IRexec: Handle events from IR remotes decoded by lircd(8)

Aditionally: for irexec add the following line to [unit]
After=multi-user.target lircd.service

[Tijmen Stam / IIVQ (info-iivq)]

Correction: for irexec.service, add the following line to [unit]
After=lircd.service

(multi-user.target is not necessary)