[lld] [lld][ELF] Support LLVM repository and LLVM revision information (PR #97323)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

As this check in Meson only seems to be used to differentiate between the `ld.lld` and `lld-link` interface for the Windows targets, it should be enough to only adjust the printout in `lld/MinGW/Driver.cpp`, e.g. with this diff:

```diff
diff --git a/lld/MinGW/Driver.cpp b/lld/MinGW/Driver.cpp
index 1fd120ad3601..35fd478a2190 100644
--- a/lld/MinGW/Driver.cpp
+++ b/lld/MinGW/Driver.cpp
@@ -199,7 +199,7 @@ bool link(ArrayRef<const char *> argsArr, llvm::raw_ostream &stdoutOS,
   // a GNU compatible linker. As long as an output for the -v option
   // contains "GNU" or "with BFD", they recognize us as GNU-compatible.
   if (args.hasArg(OPT_v) || args.hasArg(OPT_version))
-    message(getLLDVersion() + ", compatible with GNU linkers");
+    message(getLLDVersion() + " (compatible with GNU linkers)");
 
   // The behavior of -v or --version is a bit strange, but this is
   // needed for compatibility with GNU linkers.

```

https://github.com/llvm/llvm-project/pull/97323