Bug: make install depends on emacs being detected during configure in 0.18

[David Bremner]

Benjamin Podszun <benjamin.podszun at gmail.com> writes:

> Hi.
>
> As discussed on IRC, mostly to archive the issue here as well: 0.18
> fails during make install if emacs is missing, due to a missing
> emacs/notmuch-version.el file (which is generated from a template, but
> not if you don't _have_ emacs).
>

This should hopefully be fixed in commit f0ad36c, which is in release
0.18.1.

d