projectquota: build types and unsupported stubs everywhere

Signed-off-by: Timo Rothenpieler <timo@rothenpieler.org>

daemon/graphdriver/quota/projectquota_unsupported.go

@@ -1,4 +1,4 @@
-// +build linux,exclude_disk_quota linux,!cgo
+// +build linux,exclude_disk_quota linux,!cgo !linux
 
 package quota // import "github.com/docker/docker/daemon/graphdriver/quota"
 

daemon/graphdriver/quota/types.go

@@ -1,5 +1,3 @@
-// +build linux
-
 package quota // import "github.com/docker/docker/daemon/graphdriver/quota"
 
 import "sync"