Add solaris build support

Signed-off-by: Edward Pilatowicz <edward.pilatowicz@oracle.com>

fs/copy_linux.go

@@ -5,6 +5,7 @@ import (
 	"os"
 	"syscall"
 
+	"github.com/containerd/containerd/sys"
 	"github.com/containerd/continuity/sysx"
 	"github.com/pkg/errors"
 	"golang.org/x/sys/unix"
@@ -22,7 +23,7 @@ func copyFileInfo(fi os.FileInfo, name string) error {
 		}
 	}
 
-	timespec := []unix.Timespec{unix.Timespec(st.Atim), unix.Timespec(st.Mtim)}
+	timespec := []unix.Timespec{unix.Timespec(sys.StatAtime(st)), unix.Timespec(sys.StatMtime(st))}
 	if err := unix.UtimesNanoAt(unix.AT_FDCWD, name, timespec, unix.AT_SYMLINK_NOFOLLOW); err != nil {
 		return errors.Wrapf(err, "failed to utime %s", name)
 	}