This change greatly reduces the number of modules that need to be
compiled. The only issue right now is that sometimes when viewing
symbol table entries, the aliased symbol is chosen.
The `HDRS` and/or `INCS` variables need to be defined in order for
`mkdeps.com` to compute build dependencies for `o//depend`. We're using
INCS here since makeint.h is the evil kind of header that isn't actually
defining a library interface but rather is a hodgepodge of common code.
