app: fix onInputQueueDestroyed shadowing bug.

Change-Id: Ia225c944e76c9ccd3f9ab16d7d13afbcbf41fd16
Reviewed-on: https://go-review.googlesource.com/10560
Reviewed-by: David Symonds <dsymonds@golang.org>

app/android.go

@@ -185,7 +185,7 @@ func onInputQueueCreated(activity *C.ANativeActivity, q *C.AInputQueue) {
 }
 
 //export onInputQueueDestroyed
-func onInputQueueDestroyed(activity *C.ANativeActivity, queue *C.AInputQueue) {
+func onInputQueueDestroyed(activity *C.ANativeActivity, q *C.AInputQueue) {
 	queue = nil
 }