[llvm] [llvm-lib][llvm-dlltool][Object] Add support for EXPORTAS name types. (PR #78772)

[Daniel Paoliello via llvm-commits]

dpaoliello wrote:

> My intention was for #81059 to depend on this one. Its first commit is the same as this PR, I meant it to be "stacked" PR, sorry if I made it wrong.

Ah, I didn't see that in the other PR, GitHub doesn't make it as explicit as phabricator did.

https://github.com/llvm/llvm-project/pull/78772