Update CRI to master

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

vendor/github.com/opencontainers/runtime-tools/filepath/join.go

@@ -1,9 +0,0 @@
-package filepath
-
-import "strings"
-
-// Join is an explicit-OS version of path/filepath's Join.
-func Join(os string, elem ...string) string {
-	sep := Separator(os)
-	return Clean(os, strings.Join(elem, string(sep)))
-}