Import LLVM StringMap et al.

Change-Id: Ic48c722c2856c7aa36001935adbcf31b986ac1f3

src/nt_persistent.cpp

@@ -0,0 +1,22 @@
+/*----------------------------------------------------------------------------*/
+/* Copyright (c) FIRST 2015. All Rights Reserved.                             */
+/* Open Source Software - may be modified and shared by FRC teams. The code   */
+/* must be accompanied by the FIRST BSD license file in the root directory of */
+/* the project.                                                               */
+/*----------------------------------------------------------------------------*/
+
+#include "ntcore.h"
+
+#include <cstdio>
+
+#include "nt_storage.h"
+
+using namespace NtImpl;
+
+void NT_SavePersistent(const char *filename)
+{
+}
+
+void NT_LoadPersistent(const char *filename)
+{
+}