[release] Skip CC list on auto-roll CLs

NOTRY=true
TBR=hablich@chromium.org

Bug: v8:6574
Change-Id: Ibe9d023a11a062f167a696e752478f3355f32bb4
Reviewed-on: https://chromium-review.googlesource.com/561001Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46424}

tools/release/git_recipes.py

@@ -222,6 +222,7 @@ class GitRecipesMixin(object):
       args += ["--cc", Quoted(cc)]
     if use_gerrit:
       args += ["--gerrit"]
+      args += ["--private"]
     # TODO(machenbach): Check output in forced mode. Verify that all required
     # base files were uploaded, if not retry.
     self.Git(MakeArgs(args), pipe=False, **kwargs)

tools/release/test_scripts.py

@@ -1271,7 +1271,7 @@ LOG=N
       Cmd("git commit -aF \"%s\"" % TEST_CONFIG["COMMITMSG_FILE"], ""),
       RL("reviewer@chromium.org"),  # V8 reviewer.
       Cmd("git cl upload --send-mail -r \"reviewer@chromium.org\" "
-          "--bypass-hooks --cc \"ulan@chromium.org\" --gerrit", ""),
+          "--bypass-hooks --cc \"ulan@chromium.org\" --gerrit --private", ""),
       Cmd("git checkout -f %s" % TEST_CONFIG["BRANCHNAME"], ""),
       RL("LGTM"),  # Enter LGTM for V8 CL.
       Cmd("git cl presubmit", "Presubmit successfull\n"),
@@ -1653,7 +1653,7 @@ NOTREECHECKS=true
       Cmd("git commit -aF \"%s\"" % TEST_CONFIG["COMMITMSG_FILE"], ""),
       RL("reviewer@chromium.org"),  # V8 reviewer.
       Cmd("git cl upload --send-mail -r \"reviewer@chromium.org\" "
-          "--bypass-hooks --cc \"ulan@chromium.org\" --gerrit", ""),
+          "--bypass-hooks --cc \"ulan@chromium.org\" --gerrit --private", ""),
       Cmd("git checkout -f %s" % TEST_CONFIG["BRANCHNAME"], ""),
       RL("LGTM"),  # Enter LGTM for V8 CL.
       Cmd("git cl presubmit", "Presubmit successfull\n"),