[clang] [llvm] Add support for Windows Secure Hot-Patching (redo) (PR #145565)

[Alexandre Ganea via cfe-commits]

aganea wrote:

> #145737 for fix.
> 
> I tried moving my checkout dir to `/Users`, but this had no effect on the tests.

@nico might know a repro perhaps.

https://github.com/llvm/llvm-project/pull/145565