Spiel: Make revision warning more prominent and/or update subprojects automatically
I just happened to notice early in the text spew that results from meson setup
the following:
WARNING: Subproject spiel's revision may be out of date; its wrap file has changed since it was first configured
I usually just glance at the summary.
At the very least I think that warning (or a similar statement) should appear in the summary so that it's found. If this approach were taken, maybe also provide a hint that meson subprojects update
should be called.
Having said that, when we detect this condition, should we do the update for the user automatically? (Maybe we shouldn't. Dunno...)