After discussing with Chris Lattner, we require C++11, so lets get rid of the macros and just use C++11.

llvm-svn: 179805
diff --git a/lldb/tools/debugserver/source/DNB.h b/lldb/tools/debugserver/source/DNB.h
index c6acf5b..cd5cd61 100644
--- a/lldb/tools/debugserver/source/DNB.h
+++ b/lldb/tools/debugserver/source/DNB.h
@@ -16,6 +16,7 @@
 
 #include "DNBDefs.h"
 #include <mach/thread_info.h>
+#include <string>
 
 #define DNB_EXPORT __attribute__((visibility("default")))