Tags structinfo/enumtype with originating module; exact-match first,
then split pkg.X and filter by smod/emod. Without this, two modules
with same-leaf-name struct/enum types collapsed to whichever entry
appeared first in the chain.
Wired into 696_modtype_leaf_collision via a wwstage run_pos using
ww_ww (negative case omitted: w6c_ww has no checkfile pass). Updated
the test's Makefile deps to include the wwstage binaries.
Audited the rest of the lookup family — fnretlookup, fnparamslookup,
deflookup don't need the same treatment: the parser emits N_DOT.str
(call/field name) as the leaf only, and fnparamslookup is only
invoked with N_IDENT.str. Dotted module-qualified function calls go
through the module-mangling path instead.
Hojun-Cho
9d85aa4142