[clang] [clang][Modules] Raise empty.modulemap expected size to <70KB to fix RISC-V failure (PR #123959)

[Chuanqi Xu via cfe-commits]

https://github.com/ChuanqiXu9 approved this pull request.

CC @Bigcheese 

But I think the patch itself is good to go. Let's avoid breaking the CI.

https://github.com/llvm/llvm-project/pull/123959