[clang] [Clang][RISCV] Forward --no-relax option to linker for RISC-V (PR #76432)

[Andreu Carminati via cfe-commits]

andcarminati wrote:

> Do you need someone to commit this?

Hi @topperc, if you can commit for me I would appreciate it.

https://github.com/llvm/llvm-project/pull/76432