samples: Updated to use new hip include path

Change-Id: I53a1385a17f13a997ea21d14315f15a3ad851dab

samples/0_Intro/square/square.hipref.cpp

@@ -20,7 +20,7 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 */
 #include <stdio.h>
-#include <hip_runtime.h>
+#include "hip/hip_runtime.h"
 
 #define CHECK(cmd) \
 {\