samples: Updated to use new hip include path

Change-Id: I53a1385a17f13a997ea21d14315f15a3ad851dab


[ROCm/hip commit: 3a247efb2f]

projects/hip/samples/7_Advanced/hipblas_saxpy/saxpy.hipblasref.cpp

@@ -5,7 +5,7 @@
 #include <cmath>
 
 // header file for the GPU API
-#include <hip_runtime.h>
+#include "hip/hip_runtime.h"
 #include <hipblas.h>
 
 #define N  (1024 * 500)