[ews] Improve handling of non-existing status-bubbles on Github.
<rdar://problem/103194910>
Exception from logs: File "/var/ews/OpenSource/Tools/CISupport/ews-app/ews/common/github.py", line 230, in generate_comment_text_for_change comment_for_row += self.github_status_for_queue(change, queue) File "/var/ews/OpenSource/Tools/CISupport/ews-app/ews/common/github.py", line 272, in github_status_for_queue return u'| [{icon} {name} ]({url} "{hover_over_text}") '.format(icon=icon, name=name, url=url, hover_over_text=hover_over_text) UnboundLocalError: local variable 'url' referenced before assignment
Pull request: https://github.com/WebKit/WebKit/pull/7410
Committed 257648@main (7d063a43b838): <https://commits.webkit.org/257648@main> Reviewed commits have been landed. Closing PR #7410 and removing active labels.