[clang] [llvm] [llvm-lit] Add Windows .cmd wrapper to make llvm-lit directly runnable (PR #155226)

[Omair Javaid via cfe-commits]

omjavaid wrote:

> Looks like some of the tests are failing with this new change. Let me fix that.

This is fixed now.

https://github.com/llvm/llvm-project/pull/155226