timesync is needed during install to avoid complaints.

Reference: /n/atom/patch/applied/installtimesync
Date: Wed Feb 26 23:20:00 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/lib/dist/amd64/proto/archmin	Wed Feb 26 23:19:37 2014
+++ /sys/lib/dist/amd64/proto/archmin	Wed Feb 26 23:19:37 2014
@@ -13,7 +13,7 @@
 			realemu	775	sys	sys
 			usage	775	sys	sys
 			vga	775	sys	sys
-
+			timesync	775	sys	sys
 			mklatinkbd	775	sys	sys
 		ndb	d775	sys	sys
 			cs	775	sys	sys