[clang] clang: Forward exception_model flag for bitcode inputs (PR #146342)

[Jan Svoboda via cfe-commits]

jansvoboda11 wrote:

(FWIW I have the alternative fix here: https://github.com/jansvoboda11/llvm-project/commit/45f21d8adec34fdc13e86d529a133189ec1b1d15; happy to create a PR after yours lands.)

https://github.com/llvm/llvm-project/pull/146342