[clang] [clang-repl] Extend the C support. (PR #89804)

[Jason Molenda via cfe-commits]

jasonmolenda wrote:

fwiw if you have access to a mac, I don't think it's hard to build lldb+clang?  I have swig, cmake, and ninja installed on my mac via homebrew.

```
lldb/scripts/macos-setup-codesign.sh

mkdir build
cd build
 cmake ../llvm -G Ninja -DLLDB_ENABLE_SWIFT_SUPPORT=0 -DPython3_EXECUTABLE=/usr/bin/python3 -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=1 -DLLVM_ENABLE_PROJECTS='llvm;lldb;clang' '-DLLVM_ENABLE_RUNTIMES=libcxx;libcxxabi;libunwind' -DLLDB_ENABLE_PYTHON=1 -DLLDB_ENABLE_LUA=0

ninja lldb
bin/lldb-dotest -p TestImportBuiltinFileID.py
```

https://github.com/llvm/llvm-project/pull/89804