Start the ft_marth units

[vagnertxr]

Fills in the stubs and one-liners across the five ft_marth translation units, which were already declared in configure.py and split in splits.txt but had empty sources. 27 functions match; the units stay NonMatching.

unit	matched
ft_marth_status_uniq_process_special_s	11
if_marth_final	7
ft_marth_status_uniq_process_special_hi	4
ft_marth_status_uniq_process_special_final	3
ft_marth_status_uniq_process_special_lw	2

Most are empty bodies or constant returns. The rest: fn_106_DB60 reads a byte at +132; fn_106_BE30 is __fabs, taking and returning double (a float signature costs a frsp the target does not have); fn_106_BFE0, fn_106_C98C and fn_106_D400 install a table pointer; fn_106_CD00 stores two float arguments.

Three are left as NONMATCHING with a note. fn_106_D4E4 and fn_106_C390 copy floats between objects, and mwcc hoists the loads ahead of the stores while the target interleaves them — struct assignment, field by field and raw float pointers all produce the same schedule.

This does not link any unit. It opens five files that were empty and leaves the small stuff out of the way for whoever takes the large functions.

Verified: ninja reports 127 files OK.