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/mem_obj/mem_obj_helper_tests.cpp

@@ -6,6 +6,7 @@
  */
 
 #include "runtime/mem_obj/mem_obj_helper.h"
+
 #include "gtest/gtest.h"
 
 using namespace OCLRT;