misc/nacl: fix nacl build

Update testzip.proto to reflect vendoring of golang.org/x/arch.

Change-Id: I532da1100f74d1e9887eb3cf26974660ae818d92
Reviewed-on: https://go-review.googlesource.com/14007Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

misc/nacl/testzip.proto

@@ -27,15 +27,6 @@ go	src=..
 			internal
 				objfile
 					objfile.go
-				rsc.io
-					arm
-						armasm
-							testdata
-								+
-					x86
-						x86asm
-							testdata
-								+
 			gofmt
 				gofmt.go
 				gofmt_test.go
@@ -44,6 +35,18 @@ go	src=..
 			newlink
 				testdata
 					+
+			vendor
+				golang.org
+						x
+							arch
+								arm
+									armasm
+										testdata
+												+
+								x86
+									x86asm
+										testdata
+												+
 		archive
 			tar
 				testdata