[llvm] [RISCV] Let -data-sections also work on sbss/sdata sections (PR #87040)

[via llvm-commits]

KaiYG wrote:

I've created [an upstream PR](https://github.com/llvm/llvm-project/pull/87040) as well, so I will wait a bit longer to see if I can cherry-pick it from upstream instead.

https://github.com/llvm/llvm-project/pull/87040