Summary:
Logic for installing an uninstalling a custom `post-update` mercurial hook, invoking the script introduced in the previous diff.
This is to gather some early data before rolling this integration out more broadly, i.e. through the mercurial distribution.
Reviewed By: jknoxville
Differential Revision: D16283081
fbshipit-source-id: e8610509e5f105a9b717a881aa327bb04f9a2f4f
a6fb1a9d86