[Support] Move header to WithColor header

Forgot to move the CommandLine.h include form the implementation to the
header and didn't notice the failure with my local modules build.

llvm-svn: 333177

include/llvm/Support/WithColor.h

@@ -11,6 +11,7 @@
 #define LLVM_SUPPORT_WITHCOLOR_H
 
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/CommandLine.h"
 
 namespace llvm {
 

lib/Support/WithColor.cpp

@@ -8,7 +8,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/WithColor.h"
-#include "llvm/Support/CommandLine.h"
 #include "llvm/Support/raw_ostream.h"
 
 using namespace llvm;