[clang] [clang-repl] Lay the foundation of pretty printing for C. (PR #89811)

[Vassil Vassilev via cfe-commits]

vgvassilev wrote:

> So I am wondering if someone of the assumptions about types being larger than one another do not hold on 32 bit. Or your change has exposed an existing issue, it wouldn't be the first time.

My feeling is the latter but how can we get a debug build and debug?

https://github.com/llvm/llvm-project/pull/89811