[release-tools] Fix v8rel in branch period.

[release-tools] Fix v8rel in branch period.

In case the v8 revision in chromium was set to an older
revision that's not in the list of recent v8 releases, the
script will bail out too early. This changes iterates over
10 more revisions, which should cover all exceeding revisions
in branch period.

NOTRY=true
TBR=hablich@chromium.org

Committed: https://crrev.com/b9871d6f373346c641d5f57fbff06cd85004e31b
Cr-Commit-Position: refs/heads/master@{#27622}

[Michael Achenbach, 2015-04-07 09:38:15]

machenbach@chromium.org changed reviewers:
+ hablich@chromium.org, tandrii@chromium.org

[Michael Achenbach, 2015-04-07 09:39:30]

PTAL

https://codereview.chromium.org/1067793002/diff/1/tools/release/releases.py
File tools/release/releases.py (right):

https://codereview.chromium.org/1067793002/diff/1/tools/release/releases.py#n...
tools/release/releases.py:404: # TODO(machenbach): Unify common code with method
above.
Sorry for the code dup... need to work on this TODO.

[tandrii(chromium), 2015-04-07 10:50:28]

lgtm

[Michael Achenbach, 2015-04-07 11:12:05]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-04-07 11:12:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1067793002/1

[commit-bot: I haz the power, 2015-04-07 11:12:16]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-04-07 11:12:17]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer,
_not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[Michael Achenbach, 2015-04-07 11:27:59]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-04-07 11:28:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1067793002/1

[commit-bot: I haz the power, 2015-04-07 11:28:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-07 11:28:36]

Patchset 1 (id:??) landed as
https://crrev.com/b9871d6f373346c641d5f57fbff06cd85004e31b
Cr-Commit-Position: refs/heads/master@{#27622}