dirstate-item: ignore mtime to write v1 when `mtime-second-ambiguous` is set
We cannot preserve that information in the v1 format so that mtime is ambiguous.
Differential Revision: https://phab.mercurial-scm.org/D11844
# name space package to host third party extensionsfrom __future__ import absolute_importimport pkgutil__path__ = pkgutil.extend_path(__path__, __name__)