[llvm-branch-commits] [lld] [llvm] Backport fixes for ARM64EC import libraries (PR #84590)

[Daniel Paoliello via llvm-branch-commits]

dpaoliello wrote:

<https://github.com/llvm/llvm-project/pull/84834> has been merged into master and cherry-picked here, so this is ready to land.

> One thing we could consider is to skip .def file parser part of it. 

I'd rather not modify commits since they've already been tested in master and it makes subsequent cherry-picks more difficult.

https://github.com/llvm/llvm-project/pull/84590