[clang] [llvm] Add support for Windows Secure Hot-Patching (PR #138972)

[Qinkun Bao via cfe-commits]

qinkunbao wrote:

Hi, I have reverted the PR according to https://llvm.org/docs/DeveloperPolicy.html#patch-reversion-policy

You can fix this patch and send the patch again. Thanks

https://github.com/llvm/llvm-project/pull/138972