[release] Run blink trybot on roll CLs

TBR=hablich@chromium.org
NOTRY=true

Review-Url: https://codereview.chromium.org/1929303002
Cr-Commit-Position: refs/heads/master@{#35895}

tools/release/auto_roll.py

@@ -18,7 +18,9 @@ https://github.com/v8/v8/wiki/Triaging%20issues
 
 Please close rolling in case of a roll revert:
 https://v8-roll.appspot.com/
-This only works with a Google account.""")
+This only works with a Google account.
+
+CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel""")
 
 class Preparation(Step):
   MESSAGE = "Preparation."

tools/release/test_scripts.py

@@ -1043,6 +1043,8 @@ Please close rolling in case of a roll revert:
 https://v8-roll.appspot.com/
 This only works with a Google account.
 
+CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel
+
 TBR=reviewer@chromium.org"""
 
   # Snippet from the original DEPS file.