merging changes from OPAE branch making this branch

benchmarks/new_opencl/sgemm/kernel.cl

@@ -0,0 +1,9 @@
+__kernel void sgemm(__global float *A, __global float *B, __global float *C, int ldc)
+{
+  long i = get_global_id(0);
+  long m = get_global_id(1);
+  long n = get_global_id(2);
+  float a = A[m+n*ldc];
+  float b = B[m*ldc+i];
+  C[i+n*ldc] = C[i+n*ldc] + a * b;
+}