Restore default "yes" behavior for lint patch

Summary:
Fixes T9029

See T9029 for more details, but basically at some point phutil_console_confirm
(which takes a $default_no parameter) was refactored to $console->confirm()
which takes a $default parameter with semantics negated..

Test Plan:
Run arc lint on a repository where patch is suggested. Default
option should be "[Y/n]" to accept the patch.

Reviewers: joshuaspence, #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley

Maniphest Tasks: T9029

Differential Revision: https://secure.phabricator.com/D13873