Minor fixes to compile with g++ 5.1

src/contrib/mlir/compiler.cpp

@@ -266,16 +266,26 @@ void MLIRCompiler::build_ng_dialect()
     create_return();
 }
 
-template <>
-mlir::Value* MLIRCompiler::COMPILE_OP_DECL(ngraph::op::Add)
-{
-    return compiler.create_binary_op<mlir::NGAddOp>(ng_node);
-}
 
-template <>
-mlir::Value* MLIRCompiler::COMPILE_OP_DECL(ngraph::op::Dot)
+namespace ngraph
 {
-    return compiler.create_binary_op<mlir::NGDotOp>(ng_node);
+    namespace runtime
+    {
+        namespace ngmlir
+        {
+            template <>
+            mlir::Value* MLIRCompiler::COMPILE_OP_DECL(ngraph::op::Add)
+            {
+                return compiler.create_binary_op<mlir::NGAddOp>(ng_node);
+            }
+
+            template <>
+            mlir::Value* MLIRCompiler::COMPILE_OP_DECL(ngraph::op::Dot)
+            {
+                return compiler.create_binary_op<mlir::NGDotOp>(ng_node);
+            }
+        }
+    }
 }
 
 const MLIRCompiler::MLIRCompOpMap MLIRCompiler::op_dispatcher{

src/contrib/mlir/memory_manager.hpp

@@ -18,7 +18,7 @@
 
 #include <stdint.h>
 #include <vector>
-
+#include <stdlib.h>
 namespace ngraph
 {
     namespace runtime