clay: update dependency logic for /~ imports
To match recent changes to the build logic, where it only includes
top-level hoon files.
=+ l=(lent path)
%+ lien ~(tap in invalid)
|= i=^path
- =+ j=(lent i)
- &((gth j +(l)) =(path (scag l i)))
+ &(=(path (scag l i)) ?=([@ %hoon ~] (slag l i)))
$(builds t.builds)
(~(put by $(builds t.builds)) i.builds)
::
