[lld] [GHC] wasm-ld: split up __wasm_apply_data_relocs (PR #129007)

[Sam Clegg via llvm-commits]

https://github.com/sbc100 commented:

Looks like a reasonable approach.  Thanks for working on this.

Any ideas who to write a test for this?

https://github.com/llvm/llvm-project/pull/129007