rpm: don't hardcode the binary paths in the macros, rely on $PATH

this gives us a little bit more freedom to move things around later on,
as we don't hardcode the systemd paths in old RPMs that shall work with
new systemds.

src/core/macros.systemd.in

@@ -37,42 +37,42 @@ Requires(postun): systemd \
 %systemd_post() \
 if [ $1 -eq 1 ] ; then \
         # Initial installation \
-        @rootbindir@/systemctl preset %{?*} >/dev/null 2>&1 || : \
+        systemctl preset %{?*} >/dev/null 2>&1 || : \
 fi \
 %{nil}
 
 %systemd_preun() \
 if [ $1 -eq 0 ] ; then \
         # Package removal, not upgrade \
-        @rootbindir@/systemctl --no-reload disable %{?*} > /dev/null 2>&1 || : \
-        @rootbindir@/systemctl stop %{?*} > /dev/null 2>&1 || : \
+        systemctl --no-reload disable %{?*} > /dev/null 2>&1 || : \
+        systemctl stop %{?*} > /dev/null 2>&1 || : \
 fi \
 %{nil}
 
 %systemd_postun() \
-@rootbindir@/systemctl daemon-reload >/dev/null 2>&1 || : \
+systemctl daemon-reload >/dev/null 2>&1 || : \
 %{nil}
 
 %systemd_postun_with_restart() \
-@rootbindir@/systemctl daemon-reload >/dev/null 2>&1 || : \
+systemctl daemon-reload >/dev/null 2>&1 || : \
 if [ $1 -ge 1 ] ; then \
         # Package upgrade, not uninstall \
-        @rootbindir@/systemctl try-restart %{?*} >/dev/null 2>&1 || : \
+        systemctl try-restart %{?*} >/dev/null 2>&1 || : \
 fi \
 %{nil}
 
 %udev_hwdb_update() \
-@rootbindir@/udevadm hwdb --update >/dev/null 2>&1 || : \
+udevadm hwdb --update >/dev/null 2>&1 || : \
 %{nil}
 
 %udev_rules_update() \
-@rootbindir@/udevadm control --reload >/dev/null 2>&1 || : \
+udevadm control --reload >/dev/null 2>&1 || : \
 %{nil}
 
 %journal_catalog_update() \
-@rootbindir@/journalctl --update-catalog >/dev/null 2>&1 || : \
+journalctl --update-catalog >/dev/null 2>&1 || : \
 %{nil}
 
 %tmpfiles_create() \
-@rootbindir@/systemd-tmpfiles --create %{?*} >/dev/null 2>&1 || : \
+systemd-tmpfiles --create %{?*} >/dev/null 2>&1 || : \
 %{nil}