Revert LLVM_DEBUG as gives error: use of undeclared identifier 'DEBUG_TYPE'.

Author: johnno1962

lld/MachO/Driver.cpp

@@ -336,10 +336,10 @@ class SerialBackgroundQueue {
   }
 };
 
-#ifndef NDEBUG
+// #ifndef NDEBUG
 #include <iomanip>
 #include <iostream>
-#endif
+// #endif
 
 // Most input files have been mapped but not yet paged in.
 // This code forces the page-ins on multiple threads so
@@ -372,10 +372,12 @@ void multiThreadedPageInBackground(DeferredFiles &deferred) {
   });
 
   LLVM_ATTRIBUTE_UNUSED auto dt = high_resolution_clock::now() - t0;
-  LLVM_DEBUG(if (Process::GetEnv("LLD_MULTI_THREAD_PAGE")) std::cerr
-             << "multiThreadedPageIn " << totalBytes << "/" << included << "/"
-             << deferred.size() << "/" << std::setprecision(4)
-             << duration_cast<milliseconds>(dt).count() / 1000. << "\n");
+  // LLVM_DEBUG(
+  if (Process::GetEnv("LLD_MULTI_THREAD_PAGE"))
+    std::cerr << "multiThreadedPageIn " << totalBytes << "/" << included << "/"
+              << deferred.size() << "/" << std::setprecision(4)
+              << duration_cast<milliseconds>(dt).count() / 1000. << "\n";
+  // );
 }
 
 static void multiThreadedPageIn(const DeferredFiles &deferred,