[llvm] [WebAssembly] Support multiple `.init_array` fragments when writing Wasm objects (PR #111008)

[Sam Clegg via llvm-commits]

sbc100 wrote:

BTW viewing this diff with "ignore whitespace" helped a lot to see what was going on.

Regarding the test case, can it be written in assembly instead?  

https://github.com/llvm/llvm-project/pull/111008