`make_full_disasm_for_code + disassemble_all`: data-only splits missing macro.inc include

[emoose]

In SH1 we've been pinned to 0.35 for a bit, tried updating to 0.39 and it seems to work fine for main build, but our objdiff build uses --make_full_disasm_for_code --disassemble_all which is acting up a little now.

In yaml we have a .rodata split for data-only .c
- [0x0, .rodata, bodyprog]

in 0.35 using the disasm flags, that made an asm/USA/bodyprog/data/bodyprog.rodata.s file with the .rodata bytes inside (plus .include "macro.inc" line)

With 0.39 we still get that file, but now we also get an asm/USA/bodyprog/bodyprog.s file with the same data as that .rodata.s too, but without .include "macro.inc", causing build fail when it tries to assemble it: https://github.com/Vatuu/silent-hill-decomp/actions/runs/23677794528/job/68984322756

Looks like 0.37 did make a change around data-only splits, noticed that the splits with code+data have the macro.inc include fine too, maybe data splits need extra include line added?