[clang] Add -fuse-lipo option (PR #121231)

[Carlo Cabrera via cfe-commits]

================
@@ -910,7 +910,10 @@ void darwin::Lipo::ConstructJob(Compilation &C, const JobAction &JA,
     CmdArgs.push_back(II.getFilename());
   }
 
-  const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("lipo"));
+  std::string LipoName =
+      std::string(Args.getLastArgValue(options::OPT_fuse_lipo_EQ, "lipo"));
+  const char *Exec =
+      Args.MakeArgString(getToolChain().GetProgramPath(LipoName.c_str()));
----------------
carlocab wrote:

Seems a bit much to create a throwaway `std::string` here. Something like this should work:
```suggestion
  StringRef LipoName =
      Args.getLastArgValue(options::OPT_fuse_lipo_EQ, "lipo");
  const char *Exec =
      Args.MakeArgString(getToolChain().GetProgramPath(LipoName.data()));
```


https://github.com/llvm/llvm-project/pull/121231