cmd/stringer: exclude end-to-end test for Android

Change-Id: I37224abb3d9ca902ed23d520493f3b2794ef0471
Reviewed-on: https://go-review.googlesource.com/13261
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Andrew Gerrand <adg@golang.org>

cmd/stringer/endtoend_test.go

diff --git a/cmd/stringer/endtoend_test.go b/cmd/stringer/endtoend_test.go
index 35479f0..d71a6c1 100644
--- a/cmd/stringer/endtoend_test.go
+++ b/cmd/stringer/endtoend_test.go
@@ -2,6 +2,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// go command is not available on android
+
+// +build !android
+
 package main
 
 import (