Move mount parsing to separate package.

This moves the platform specific stuff in a separate package and keeps
the `volume` package and the defined interfaces light to import.

Signed-off-by: Brian Goff <cpuguy83@gmail.com>

daemon/archive_unix.go

@@ -4,7 +4,7 @@ package daemon // import "github.com/docker/docker/daemon"
 
 import (
 	"github.com/docker/docker/container"
-	"github.com/docker/docker/volume"
+	volumemounts "github.com/docker/docker/volume/mounts"
 )
 
 // checkIfPathIsInAVolume checks if the path is in a volume. If it is, it
@@ -12,7 +12,7 @@ import (
 // cannot be configured with a read-only rootfs.
 func checkIfPathIsInAVolume(container *container.Container, absPath string) (bool, error) {
 	var toVolume bool
-	parser := volume.NewParser(container.OS)
+	parser := volumemounts.NewParser(container.OS)
 	for _, mnt := range container.MountPoints {
 		if toVolume = parser.HasResource(mnt, absPath); toVolume {
 			if mnt.RW {