dom0/pm-utils,dom0-update: sync clock using new qvm-sync-clock tool (#435)

dom0/pm-utils/01qubes-sync-vms-clock

@@ -4,7 +4,9 @@
 
 sync_qubes_vms_wallclock()
 {
-/usr/bin/qvm-sync-dom0-clock
+# Try to sync clock from the network
+/usr/bin/qvm-sync-clock && exit 0
+# If failed - fallback to sync based on dom0 clock
 DATE=$(date)
 echo
 echo "Syncing VMs clock to: $DATE"
@@ -12,6 +14,6 @@ qvm-run --all --exclude=`qvm-get-clockvm` -u root "date -s \"$DATE\""
 }
 
 case "$1" in
-        thaw|resume) sync_qubes_vms_wallclock ;;
+        thaw|resume) sync_qubes_vms_wallclock & ;;
         *) exit 0 ;;
 esac

dom0/qvm-tools/qvm-dom0-update

@@ -66,7 +66,7 @@ fi
 
 # We should ensure the clocks in Dom0 and UpdateVM are in sync
 # becuase otherwise yum might complain about future timestamps
-qvm-sync-dom0-clock
+qvm-sync-clock
 
 echo "Checking for dom0 updates" >&2