not all bots have `env`

That's okay, that's really just me being pedantic anyway.

Change-Id: I45a0f6b4866daff752169304da171c223016cac8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289685
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
22 files changed