Set working directory in systemd service file

By default systemd will execute service with root directory (or home directory for user instance) which might result in
attempts to create files in unexpected place. Let's set it to 'osmocom' subdir of state directory (/var/lib for system instance) instead.

Related: OS#4821
Change-Id: I7696cd92953787591e7b4777ee79c2671326b972
1 file changed