[llvm] [IRLinker] Don't add duplicate named MD node operand to dest module (PR #146020)

[Alexey Bader via llvm-commits]

bader wrote:

> This patch breaks CFI, produces new false reports on indirect calls into libc.so cc @pcc

@vitalybuka, could you provide a way to reproduce that issue, please?

https://github.com/llvm/llvm-project/pull/146020