[lld] [ELF] Postpone more linker script errors (PR #96361)

[Daniel Thornburgh via llvm-commits]

https://github.com/mysterymath approved this pull request.

LGTM!

As an aside, seeing progress towards a deferred error abstraction is interesting. This might be useful (if tied with a condition) for phase ordering issues that come up, where the linker is forced to emit an error early, but it wouldn't have to if the link ends up going a particular way later. (We hit something like this in Fuchsia in https://fxbug.dev/334990275; the linker is forced to contend with an output section conflict, but the offending synthetic section ends up empty.)

https://github.com/llvm/llvm-project/pull/96361