runtime: add lock rank partial order edge sweep -> mspanSpecial
This change adds a missing partial order edge. The edge captures the
case where the background sweeper handles some specials (i.e. finalizers
or memory profile sampling) and is otherwise correct.
Fixes #42472.
Change-Id: Ic45f6cc1635fd3d6bc6c91ff6f64d436088cef33
Reviewed-on: https://go-review.googlesource.com/c/go/+/268857
Trust: Michael Knyszek <mknyszek@google.com>
Trust: Dan Scales <danscales@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Dan Scales <danscales@google.com>