[clang] [Clang] Use `-targets=host-x86_64-unknown-linux-gnu` as bundler target (PR #122627)

[Joseph Huber via cfe-commits]

https://github.com/jhuber6 approved this pull request.

Maybe one day we'll be able to get rid of the bundler.

https://github.com/llvm/llvm-project/pull/122627