[llvm] [WebAssemblyLowerEmscriptenEHSjLj] Don't assign import names to generated function declarations (PR #71599)

[Heejin Ahn via llvm-commits]

aheejin wrote:

Sorry for the delayed reply. Is this because now those symbols arrive not from JS code but from our C/C++ library code? Then does this work with dynamic linking too?

Also check the clang-format thing

https://github.com/llvm/llvm-project/pull/71599