[llvm] [WebAssembly] Allocate MCSymbolWasm data on MCContext (PR #85866)

[Tim Neumann via llvm-commits]

TimNN wrote:

@MaskRay: Thanks for the review!

> We don't typically include a full stop in the subject line.

Fixed.

> The shorter `allocateString` looks good to me.

Done, renamed to just `allocateString`.

> Consider summarizing the issue in the description.

Done.

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I don't have commit access, so it would be great if one of you could merge the PR.

https://github.com/llvm/llvm-project/pull/85866