[clang] [clang][deps] Print tracing VFS data (PR #108056)

[Steven Wu via cfe-commits]

================
@@ -1024,6 +1042,16 @@ int clang_scan_deps_main(int argc, char **argv, const 
llvm::ToolContext &) {
     Pool.wait();
   }
 
+  if (Verbose) {
+    llvm::errs() << "\n*** Virtual File System Stats:\n"
+                 << NumStatusCalls << " status() calls\n"
+                 << NumOpenFileForReadCalls << " openFileForRead() calls\n"
+                 << NumDirBeginCalls << " dir_begin() calls\n"
+                 << NumGetRealPathCalls << " getRealPath() calls\n"
+                 << NumExistsCalls << " exists() calls\n"
+                 << NumIsLocalCalls << " isLocal() calls\n";
+  }
+
----------------
cachemeifyoucan wrote:

Print after the `stopTimer()`?

https://github.com/llvm/llvm-project/pull/108056
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