Unify same fromStatT() implementation for FreeBSD and NetBSD

Suggested by Sebastiaan van Stijn, thanks!

Signed-off-by: Leonardo Taccari <leot@NetBSD.org>

pkg/system/stat_bsd.go

@@ -1,3 +1,5 @@
+// +build freebsd netbsd
+
 package system // import "github.com/docker/docker/pkg/system"
 
 import "syscall"

pkg/system/stat_netbsd.go

@@ -1,13 +0,0 @@
-package system // import "github.com/docker/docker/pkg/system"
-
-import "syscall"
-
-// fromStatT converts a syscall.Stat_t type to a system.Stat_t type
-func fromStatT(s *syscall.Stat_t) (*StatT, error) {
-	return &StatT{size: s.Size,
-		mode: uint32(s.Mode),
-		uid:  s.Uid,
-		gid:  s.Gid,
-		rdev: uint64(s.Rdev),
-		mtim: s.Mtimespec}, nil
-}