internal/binres: update wrong URL in comment

The URL in the comment was invalid due to a change in the repository directory structure.
That commit is this:
https://android.googlesource.com/platform/frameworks/base/+/f6113af2d6f6eebee68d3ac510fe96d38a7a39e9

Change-Id: I7dcb9c505de0c5ce4f4a2115d48ccb0c6eadbd52
GitHub-Last-Rev: 85c5e3af7ef53611ca8d9ad83f6929e35d114cc6
GitHub-Pull-Request: golang/mobile#42
Reviewed-on: https://go-review.googlesource.com/c/mobile/+/215357
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/internal/binres/binres.go b/internal/binres/binres.go
index 7b5c3bf..096a6e9 100644
--- a/internal/binres/binres.go
+++ b/internal/binres/binres.go
@@ -41,7 +41,7 @@
 //    [...node]
 //
 // Additional resources:
-// https://android.googlesource.com/platform/frameworks/base/+/master/include/androidfw/ResourceTypes.h
+// https://android.googlesource.com/platform/frameworks/base/+/master/libs/androidfw/include/androidfw/ResourceTypes.h
 // https://justanapplication.wordpress.com/2011/09/13/ (a series of articles, increment date)
 package binres