Stop using ../../test_common to include common headers

Fixes #395.

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

test_conformance/clcpp/common.hpp

@@ -24,13 +24,13 @@
 #include <sys/stat.h>
 
 // harness framework
-#include "../../test_common/harness/compat.h"
-#include "../../test_common/harness/testHarness.h"
-#include "../../test_common/harness/errorHelpers.h"
-#include "../../test_common/harness/kernelHelpers.h"
+#include "harness/compat.h"
+#include "harness/testHarness.h"
+#include "harness/errorHelpers.h"
+#include "harness/kernelHelpers.h"
 
 // autotest
-#include "../../test_common/autotest/autotest.hpp"
+#include "autotest/autotest.hpp"
 
 // utils_common
 #include "utils_common/is_vector_type.hpp"

test_conformance/clcpp/images/common.hpp

@@ -24,7 +24,7 @@
 // This global variable is used by read_image_pixel from harness/imageHelpers
 bool gTestRounding = false;
 
-#include "../../../test_common/harness/imageHelpers.h"
+#include "../harness/imageHelpers.h"
 
 
 namespace detail

test_conformance/clcpp/utils_common/errors.hpp

@@ -18,7 +18,7 @@
 
 #include <string>
 
-#include "../../../test_common/harness/errorHelpers.h"
+#include "../harness/errorHelpers.h"
 
 // ------------- Check OpenCL error helpers (marcos) -----------------