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

[Vassil Vassilev via cfe-commits]

vgvassilev wrote:

> You can debug it by cross-compiling a debug build, then running the unit tests binary and connecting to qemu's built in gdbserver. The Arm toolchain might have a copy of gdb in it already, but if not, gdb multiarch and lldb would also work (which are both installable from apt).
> 
> I'm going to try looking in a debugger myself today.

Ok, this sounds good. I've never thought about that setup and perhaps is just fine to suppress that test.

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