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

[Rainer Orth via cfe-commits]

rorth wrote:

Both the original patch and the redo break the [Solaris/amd64 buildbot](https://lab.llvm.org/staging/#/builders/120/builds/9897).  I wonder if somehow the fact that the source lives in `/opt/llvm-buildbot` somehow interferes with Windows command line parsing?

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