* ld.scripts/defined.exp, ld.scripts/defined.s: New files.
* ld.scripts/defined.t: New file.
* lib/ld.exp (default_ld_simple_link): New function.
(default_ld_assemble, default_ld_nm): New functions.
* config/default.exp: Rename from unix-ld.exp.
(ld_simple_link, ld_assemble, ld_nm): New functions.