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

[via llvm-commits]

KaiYG wrote:

Ping.
I think this patch will save code size on both bfd/lld linker, and a similar patch has been done on the Hexagon backend.

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