Tooling: use stderr, not stdout for missing command line messages

Matches other tooling output that use stderr.

llvm-svn: 208988
diff --git a/clang/lib/Tooling/Tooling.cpp b/clang/lib/Tooling/Tooling.cpp
index 610bfc8..3fe0c83 100644
--- a/clang/lib/Tooling/Tooling.cpp
+++ b/clang/lib/Tooling/Tooling.cpp
@@ -256,7 +256,7 @@
   // pass it to an std::unique_ptr declared after the Compiler variable.
   std::unique_ptr<FrontendAction> ScopedToolAction(create());
 
-  // Create the compilers actual diagnostics engine.
+  // Create the compiler's actual diagnostics engine.
   Compiler.createDiagnostics(DiagConsumer, /*ShouldOwnClient=*/false);
   if (!Compiler.hasDiagnostics())
     return false;
@@ -290,7 +290,7 @@
       // about the .cc files that were not found, and the use case where I
       // specify all files I want to run over explicitly, where this should
       // be an error. We'll want to add an option for this.
-      llvm::outs() << "Skipping " << File << ". Command line not found.\n";
+      llvm::errs() << "Skipping " << File << ". Compile command not found.\n";
     }
   }
 }