Fix environment variables printed by run_emulators
Fix environment variables printed by run_emulators

Change-Id: Id87ab35c5f33c3bbeb7f483ec6d784718b9e1eaf
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/234496
Reviewed-by: Ben Wagner aka dogben <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot