Emit KEXC relocation table with `-fauto-relocation`

[pixelherodev]

[pixelherodev]

Merge blockers:

• [ ] Since this changes the output of -fauto-relocation, the CRT0 for KCC needs to be updated.
• [ ] This needs to be further tested (every package in core/ should be tested with this)

[pixelherodev]

Tested and working on core/init

[pixelherodev]

Since some core/ packages depend on relative labels, this blocks on those.

[pixelherodev]

Relative labels are in, so this... should be fine? Going to finish testing scas on all of our packages first.