During pill and install prop generation.
In autopill, we stop tracking a copy of the blob store, instead just
having the pill lib scry it out on-demand.
Notably, we include the base desk last. This is to ensure that the
other desks are present by the time kiln gets loaded from base, letting
it install the software on the other desks, as per 22ad2516c.
Introduces a %boot-pill mark and associated types, to distinguish pills
that can be used to boot a ship and the ivory pill. Changes aqua to
receive this new %boot-pill mark
* jb/re-mug-pre:
arvo: temporary, build +brass out of /not-sys
hoon: switches to new +mug
u3: adds new +mug (as u3r_gum_*)
hoon: adds new +mug (as +gum)
u3: updates +muk to truncate seed and removes spurious assertion
hoon: updates +muk to truncate seed and removes spurious assertion
