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>
1 file changed