runtime: fix incorrect comment
Fix incorrect comment for the runtime package.
Change-Id: Iab889eff0e9c622afbed959d32b8b5f0ed0bfebf
GitHub-Last-Rev:
e9587868db36d9dd466f52f7ffc5de09947a6b2f
GitHub-Pull-Request: golang/go#57731
Reviewed-on: https://go-review.googlesource.com/c/go/+/461498
Reviewed-by: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Keith Randall <khr@google.com>