trace: regenerate trace from go@81d424e

[git-generate]
cd trace
./gen.bash $HOME/work/go-1

Change-Id: If29d2ab2f86f263bdf43700426d86c873c30a001
Reviewed-on: https://go-review.googlesource.com/c/exp/+/589515
LUCI-TryBot-Result: Go LUCI <[email protected]>
Auto-Submit: Michael Knyszek <[email protected]>
Reviewed-by: Carlos Amedee <[email protected]>

Author: mknyszek