resolved: Do not add .busname dependencies, when compiling without kdbus.

(cherry picked from commit defa8e675b)

Makefile.am

@@ -5459,7 +5459,7 @@ dist_dbussystemservice_DATA += \
 	src/resolve/org.freedesktop.resolve1.service
 
 EXTRA_DIST += \
-	units/systemd-resolved.service.in
+	units/systemd-resolved.service.m4.in
 
 SYSTEM_UNIT_ALIASES += \
 	systemd-resolved.service dbus-org.freedesktop.resolve1.service

units/.gitignore

@@ -55,6 +55,7 @@
 /systemd-reboot.service
 /systemd-remount-fs.service
 /systemd-resolved.service
+/systemd-resolved.service.m4
 /systemd-hibernate-resume@.service
 /systemd-rfkill@.service
 /systemd-shutdownd.service

units/systemd-resolved.service.m4.in

@@ -10,11 +10,13 @@ Description=Network Name Resolution
 Documentation=man:systemd-resolved.service(8)
 After=systemd-networkd.service network.service
 
+m4_ifdef(`ENABLE_KDBUS',
 # On kdbus systems we pull in the busname explicitly, because it
 # carries policy that allows the daemon to acquire its name.
 Wants=org.freedesktop.resolve1.busname
 After=org.freedesktop.resolve1.busname
 
+)m4_dnl
 [Service]
 Type=notify
 Restart=always