Take unordered_map from std namespace

Author: AMDmi3

src/include/xm_hashmap.h

@@ -1,6 +1,6 @@
 #ifndef __XMHASHMAP_H__
 #define __XMHASHMAP_H__
 
-#include <tr1/unordered_map>
-namespace HashNamespace = std::tr1;
+#include <unordered_map>
+namespace HashNamespace = std;
 #endif