Fixed Debian package rule script.

(Redmine issue: #7041)

packaging/debian/rules

@@ -17,9 +17,9 @@ binary:
 	mkdir -p debian/mentat-ng
 	mkdir -p debian/mentat-ng/etc/mentat
 	mkdir -p debian/mentat-ng/usr/share/bash-completion/completions
+	mkdir -p debian/mentat-ng/etc/systemd/system
 
 	cp -r ../conf/* debian/mentat-ng/etc/mentat/
-	cp -r ../migrations-events debian/mentat-ng/etc/mentat/
 	cp -r ../etc/bash_completion.d/* debian/mentat-ng/usr/share/bash-completion/completions
 	cp -r ../etc/default debian/mentat-ng/etc/
 	cp -r ../etc/init.d debian/mentat-ng/etc/