[llvm] [TARGETS-PARSER] Added const reference for params with size >= 16 bytes (PR #125083)

[Matt Arsenault via llvm-commits]

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@@ -32,7 +32,7 @@ namespace adjust {
 using namespace llvm;
 
 static void unsigned_width(unsigned Width, uint64_t Value,
-                           std::string Description, const MCFixup &Fixup,
+                           const std::string &Description, const MCFixup &Fixup,
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arsenm wrote:

This should be using StringRef, and the code below should be using Twine instead of building the string itself 

https://github.com/llvm/llvm-project/pull/125083