Move even more stuff into dockerversion

Also, use it in all the places. :)

Docker-DCO-1.1-Signed-off-by: Andrew Page <admwiggin@gmail.com> (github: tianon)
Upstream-commit: da04f49b383c02ee28c32f948048b9e9a402bb4f
Component: engine

components/engine/dockerinit/dockerinit.go

@@ -4,11 +4,6 @@ import (
 	"github.com/dotcloud/docker/sysinit"
 )
 
-var (
-	GITCOMMIT string
-	VERSION   string
-)
-
 func main() {
 	// Running in init mode
 	sysinit.SysInit()