Make helper functions/classes/globals static. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228410 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/CommandLine.cpp

@@ -83,6 +83,8 @@ void StringSaver::anchor() {}
 
 //===----------------------------------------------------------------------===//
 
+namespace {
+
 class CommandLineParser {
 public:
   // Globals for name and overview of program.  Program name is not a string to
@@ -190,6 +192,8 @@ public:
   void printOptionValues();
 };
 
+} // namespace
+
 static ManagedStatic<CommandLineParser> GlobalParser;
 
 void cl::AddLiteralOption(Option &O, const char *Name) {