systemd: actually enable qubes-random-seed service

QubesOS/qubes-issues#1311

(cherry picked from commit 7963fb91c7)

Conflicts:
	rpm_spec/core-vm.spec
	vm-systemd/75-qubes-vm.preset

rpm_spec/core-vm.spec

@@ -533,6 +533,7 @@ The Qubes core startup configuration for SystemD init.
 /lib/systemd/system/qubes-update-check.timer
 /lib/systemd/system/qubes-updates-proxy.service
 /lib/systemd/system/qubes-qrexec-agent.service
+/lib/systemd/system/qubes-random-seed.service
 /lib/systemd/system-preset/75-qubes-vm.preset
 /lib/modules-load.d/qubes-core.conf
 /lib/modules-load.d/qubes-misc.conf
@@ -542,6 +543,7 @@ The Qubes core startup configuration for SystemD init.
 /usr/lib/qubes/init/misc-post.sh
 /usr/lib/qubes/init/misc-post-stop.sh
 /usr/lib/qubes/init/mount-home.sh
+/usr/lib/qubes/init/qubes-random-seed.sh
 /usr/lib/qubes/init/qubes-sysinit.sh
 /lib/systemd/system/chronyd.service.d/30_qubes.conf
 /lib/systemd/system/crond.service.d/30_qubes.conf
@@ -564,6 +566,7 @@ else
     services="qubes-dvm qubes-misc-post qubes-firewall qubes-mount-home"
     services="$services qubes-netwatcher qubes-network qubes-sysinit"
     services="$services qubes-updates-proxy qubes-qrexec-agent"
+    services="$services qubes-random-seed"
     for srv in $services; do
         /bin/systemctl --no-reload preset $srv.service
     done

vm-systemd/75-qubes-vm.preset

@@ -70,5 +70,6 @@ enable qubes-netwatcher.service
 enable qubes-meminfo-writer.service
 enable iptables.service
 enable ip6tables.service
+enable qubes-random-seed.service
 enable haveged.service
 enable chronyd.service

vm-systemd/qubes-random-seed.service

@@ -1,10 +1,12 @@
 [Unit]
 Description=Qubes Random Seed
 DefaultDependencies=no
-RequiresMountsFor=/proc/xen/
 After=qubes-db.service
 
 [Service]
 Type=oneshot
 RemainAfterExit=yes
 ExecStart=/usr/lib/qubes/init/qubes-random-seed.sh
+
+[Install]
+WantedBy=sysinit.target