[llvm] [llvm] annotate interfaces in llvm/Support for DLL export (PR #136014)

[Andrew Rogers via llvm-commits]

andrurogerz wrote:

@nikic I've reworked the stack of commits after updating IDS to automatically handle the vtable export case. You will see that the set of manual fixups is significantly smaller. Please let me know if this seems more reasonable to you now.

https://github.com/llvm/llvm-project/pull/136014