clang-format: enable sorting includes

Include files are now grouped and sorted in following order:
1. Header file of the class the current file implements
2. Project files
3. Third party files
4. Standard library

Change-Id: If31af05652184169f7fee1d7ad08f1b2ed602cf0
Signed-off-by: Filip Hazubski <filip.hazubski@intel.com>

unit_tests/helpers/execution_environment_helper.h

@@ -1,15 +1,17 @@
 /*
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2018-2019 Intel Corporation
  *
  * SPDX-License-Identifier: MIT
  *
  */
 
 #pragma once
-#include "CL/cl.h"
-#include <cstdint>
 #include "runtime/execution_environment/execution_environment.h"
 
+#include "CL/cl.h"
+
+#include <cstdint>
+
 namespace OCLRT {
 ExecutionEnvironment *getExecutionEnvironmentImpl(HardwareInfo *&hwInfo);
 } // namespace OCLRT