[llvm] [RISCV] Track Linker Relaxable through Assembly Relaxation (PR #152602)

[Fangrui Song via llvm-commits]

================
@@ -0,0 +1,79 @@
+# RUN: llvm-mc --triple=riscv32 -mattr=+relax,+experimental-xqcilb,+experimental-xqcibi \
----------------
MaskRay wrote:

Suggest that we don't use pr... in the test filename. Use linker-relaxation-xqcibi.s or xqcibi-linker-relaxation.s

We can specify "## PR150071" as a comment.

https://github.com/llvm/llvm-project/pull/152602