Trigger v8_linux64_perf_try on swarming

R=machenbach@chromium.org
NOTRY=true

Bug: chromium:616879
Change-Id: Ie732c5432cc0b69a28b4e356d9cead5855d00a7c
Reviewed-on: https://chromium-review.googlesource.com/915361
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51300}

tools/try_perf.py

@@ -22,7 +22,9 @@ BOTS = {
 
 # This list will contain builder names that should be triggered on an internal
 # swarming bucket instead of internal Buildbot master.
-SWARMING_BOTS = []
+SWARMING_BOTS = [
+  'v8_linux64_perf_try',
+]
 
 DEFAULT_BOTS = [
   'v8_arm32_perf_try',