[llvm] [Kaleidoscope] Fix ForExprAST::codegen (PR #88207)

[Vlad Mishel via llvm-commits]

vmishelcs wrote:

@Logikable Please take a look at the changes I've made, as per your instructions. The build is failing, but I see that the Kaleidoscope tests are passing, so I assume it was because I merged main into my branch before pushing and there is an issue with some of the code in main.

Let me know if there are any other issues with my PR! 🙂

https://github.com/llvm/llvm-project/pull/88207