[lld] Add (ignored) /link flag to lld-link for compatibility with MSVC link.exe (PR #168364)

[Frankie Robertson via llvm-commits]

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@@ -862,6 +862,9 @@ opt::InputArgList ArgParser::parse(ArrayRef<const char *> argv) {
                 << "', did you mean '" << nearest << "'";
   }
 
+  if (args.hasArg(OPT_link))
+    Warn(ctx) << "ignoring /link, did you pass it multiple times?";
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frankier wrote:

I did this to match link.exe which gives a warning.

https://github.com/llvm/llvm-project/pull/168364