[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.

You can also check the test command lines and the outputs by running a single test in a more verbose more, such as:
```
> py {build_folder}/bin/llvm-lit.py -a -vv clang/test/CodeGen/X86/ms-secure-hotpatch.c
```
And try to tweak the base folder or the command lines accordingly until you hit the issue.

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