encoding/binary: add missing test helper calls
Various functions in binary_test.go were missing some t.Helper() calls,
so this adds them in.
Change-Id: I0e5894e3c3cf72627203694a32adca51fe1563f5
GitHub-Last-Rev:
b28c9255b3b5db3cf18b5406a4e13613d10b8da5
GitHub-Pull-Request: golang/go#63897
Reviewed-on: https://go-review.googlesource.com/c/go/+/539135
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Keith Randall <khr@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: qiu laidongfeng2 <2645477756@qq.com>
Auto-Submit: Keith Randall <khr@golang.org>