[clang] [clang-repl] Fix generation of wasm binaries while running clang-repl in browser (PR #117978)

[Anutosh Bhat via cfe-commits]

anutosh491 wrote:

Hey @vgvassilev thanks for the reviews. Addressed them. Once merged, I shall do a cherry pick of the required commit !

https://github.com/llvm/llvm-project/pull/117978