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

Fixes #395.

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

test_conformance/profiling/readImage.c

@@ -13,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-#include "../../test_common/harness/compat.h"
+#include "harness/compat.h"
 
 #include <stdio.h>
 #include <string.h>
@@ -21,8 +21,8 @@
 #include <sys/stat.h>
 
 #include "procs.h"
-#include "../../test_common/harness/testHarness.h"
-#include "../../test_common/harness/errorHelpers.h"
+#include "harness/testHarness.h"
+#include "harness/errorHelpers.h"
 
 //--- the code for the kernel executables
 static const char *readKernelCode[] = {