[fprint] libfprint ported to Meson and gtk-doc

[Bastien Nocera]

On Fri, 2018-05-18 at 09:49 +0300, Igor Filatov wrote:
> > From the user's perspective, users shouldn't have to build their
> own
> > system libraries. From the developers point-of-view, the rules are
> > actually readable, understandable, and it takes as long to build
> > libfprint and the docs as it did just running configure. So I'm
> fine
> > with the drawbacks :)
> 
> But they actually do it sometimes :) I understand there's no going
> back, which is ok. Just saying that build and install docs would be a
> welcome addition to the docs. Willing to help with it if needed.

The updated INSTALL file points to the Meson quick start docs (and the
full-on developer docs).