[clang] [clang-repl] fix vtable symbol duplication error (closes #141039) (PR #185648)

[Vassil Vassilev via cfe-commits]

vgvassilev wrote:

I believe we should be looking at why this function decides to emit the vtable twice: https://github.com/llvm/llvm-project/blob/3548ec95178c00a2895a65b435945ce318396c8e/clang/lib/CodeGen/CodeGenModule.cpp#L3680

The reset happens probably here https://github.com/llvm/llvm-project/blob/3548ec95178c00a2895a65b435945ce318396c8e/clang/lib/CodeGen/CodeGenModule.cpp#L8496

https://github.com/llvm/llvm-project/pull/185648