add docker cmd, and test opencl with ftest

ytest_t/test/vector_add_kernel.cl

@@ -0,0 +1,8 @@
+__kernel void vector_add(float alpha, __global const int *A, __global const int *B, __global int *C) {
+ 
+    // Get the index of the current element to be processed
+    int i = get_global_id(0);
+ 
+    // Do the operation
+    C[i] = alpha * A[i] + B[i];
+}