vendor: add buildkit

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/golang.org/x/crypto/ssh/terminal/terminal.go

@@ -159,6 +159,10 @@ func bytesToKey(b []byte, pasteActive bool) (rune, []byte) {
 			return keyClearScreen, b[1:]
 		case 23: // ^W
 			return keyDeleteWord, b[1:]
+		case 14: // ^N
+			return keyDown, b[1:]
+		case 16: // ^P
+			return keyUp, b[1:]
 		}
 	}