[llvm-branch-commits] [NFC][RISCV] Simplify the dynamic linker construction logic (PR #97383)

[Pengcheng Wang via llvm-branch-commits]

https://github.com/wangpc-pp created https://github.com/llvm/llvm-project/pull/97383

The format of dynamic linker is `ld-linux-{arch}-{abi}.so.1`, so
we can just get the arch name from arch type.