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

[Daniel Paoliello via llvm-branch-commits]

dpaoliello wrote:

@cjacek if you really want me to revert the def parser portion, then I can do that. Otherwise, can you please sign off?

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