[dev.cc] misc/nacl: add testdata for cmd/internal/rsc.io/x86/x86asm

Should fix nacl build on dev.cc.

Change-Id: I166a03b5f6903bd8bbce65af4e5f2899807bb6cc
Reviewed-on: https://go-review.googlesource.com/5575Reviewed-by: Russ Cox <rsc@golang.org>
Run-TryBot: Russ Cox <rsc@golang.org>

misc/nacl/testzip.proto

@@ -18,6 +18,15 @@ go	src=..
 			internal
 				objfile
 					objfile.go
+				rsc.io
+					arm
+						armasm
+							testdata
+								+
+					x86
+						x86asm
+							testdata
+								+
 			gofmt
 				gofmt.go
 				gofmt_test.go