added more changes to memcpytosymbol

1. Refactored code to use HCC internal APIs rather than HCC copy APIs
2. Added hipMemcpyToSymbolAsync
3. Added test for hipMemcpyToSymbolAsync
4. Added new error hipErrorInvalidSymbol

Change-Id: I0e359b2d0ff5d682bbccdf9c2923e16b35e39497

tests/src/deviceLib/hipTestDeviceSymbol.cpp

@@ -38,13 +38,29 @@ int main()
     int *A, *B, *Ad;
     A = new int[NUM];
     B = new int[NUM];
-    for(unsigned i=0;i<NUM;i++)
-    {
+    for(unsigned i=0;i<NUM;i++) {
         A[i] = -1*i;
         B[i] = 0;
     }
 
     hipMalloc((void**)&Ad, SIZE);
+
+    hipStream_t stream;
+    hipStreamCreate(&stream);
+    hipMemcpyToSymbolAsync("global", A, SIZE, 0, hipMemcpyHostToDevice, stream);
+    hipStreamSynchronize(stream);
+    hipLaunchKernel(Assign, dim3(1,1,1), dim3(NUM,1,1), 0, 0, Ad);
+    hipMemcpy(B, Ad, SIZE, hipMemcpyDeviceToHost);
+
+    for(unsigned i=0;i<NUM;i++) {
+        assert(A[i] == B[i]);
+    }
+
+    for(unsigned i=0;i<NUM;i++) {
+        A[i] = -2*i;
+        B[i] = 0;
+    }
+
     hipMemcpyToSymbol("global", A, SIZE, 0, hipMemcpyHostToDevice);
     hipLaunchKernel(Assign, dim3(1,1,1), dim3(NUM,1,1), 0, 0, Ad);
     hipMemcpy(B, Ad, SIZE, hipMemcpyDeviceToHost);