Recently, a commit (85ecc51c) changed the instruction from VORL to VOR.

Fixes #19014

Change-Id: I9a7e0b5771842b1abb5afc73dc41d5e7960cf390
Reviewed-on: https://go-review.googlesource.com/36625
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>