Install rpm-ostree sysusers config and countme units

Install the systemd unit, timer and sysusers configuration for Count Me
support. We do not enable or pull as a dependency those units by default
as this is a decision that should be taken at the distribution level and
needs support on the infrastructure side.

To enable those units in a disctribution package, you can add the
following symlink:
$ ln -snf /usr/lib/systemd/system/rpm-ostree-countme.timer /usr/lib/systemd/system/rpm-ostreed.service.wants/

or add the following config snippet to the rpm-ostreed.service unit:
Wants=rpm-ostree-countme.timer

Makefile-daemon.am

@@ -59,10 +59,14 @@ systemdunit_service_in_files = \
 	$(srcdir)/src/daemon/rpm-ostreed.service.in \
 	$(srcdir)/src/daemon/rpm-ostreed-automatic.service.in \
 	$(srcdir)/src/daemon/rpm-ostree-bootstatus.service.in \
+	$(srcdir)/src/daemon/rpm-ostree-countme.service.in \
 	$(NULL)
 
 systemdunit_service_files = $(systemdunit_service_in_files:.service.in=.service)
-systemdunit_timer_files = $(srcdir)/src/daemon/rpm-ostreed-automatic.timer
+systemdunit_timer_files = \
+	$(srcdir)/src/daemon/rpm-ostreed-automatic.timer \
+	$(srcdir)/src/daemon/rpm-ostree-countme.timer \
+	$(NULL)
 
 systemdunit_DATA = \
 	$(systemdunit_service_files) \
@@ -78,6 +82,9 @@ endif
 $(systemdunit_service_files): Makefile
 	$(SED_SUBST) $(daemon_asan_options) $@.in > $@
 
+systemdsysusers_DATA = $(srcdir)/src/daemon/rpm-ostree.conf
+systemdsysusersdir   = $(prefix)/lib/sysusers.d
+
 # We keep this stub script around to have SELinux labeling work,
 # plus some backwards compatibility.
 libexec_SCRIPTS = rpm-ostreed
@@ -107,6 +114,7 @@ EXTRA_DIST += \
 	$(service_in_files) \
 	$(systemdunit_service_in_files) \
 	$(systemdunit_timer_files) \
+	$(systemdsysusers_conf_files) \
 	$(NULL)
 
 CLEANFILES += \

packaging/rpm-ostree.spec.in

@@ -175,6 +175,7 @@ $PYTHON autofiles.py > files \
   '%{_datadir}/dbus-1/system.d/*' \
   '%{_sysconfdir}/rpm-ostreed.conf' \
   '%{_prefix}/lib/systemd/system/*' \
+  '%{_prefix}/lib/sysusers.d*' \
   '%{_libexecdir}/rpm-ostree*' \
   '%{_datadir}/polkit-1/actions/*.policy' \
   '%{_datadir}/dbus-1/system-services' \

src/daemon/rpm-ostree-countme.service.in

@@ -9,4 +9,4 @@ User=rpm-ostree
 DynamicUser=yes
 StateDirectory=rpm-ostree-countme
 StateDirectoryMode=750
-ExecStart=/usr/bin/rpm-ostree countme
+ExecStart=@bindir@/rpm-ostree countme

src/daemon/rpm-ostree.conf

@@ -0,0 +1 @@
+u rpm-ostree - "Unprivileged rpm-ostree user"