Fix various uses of non-standard C++:

* Replace u_int32_t with uint32_t
* Replace size_t with uint32_t for initializer list of TensorInfo
* Replace variable size arrays with std::vector
* Replace reference to local variable during its initialisation

Change-Id: I298b3995f1525f90a1ab2416d7e270315698fae3
diff --git a/src/backends/reference/workloads/Debug.cpp b/src/backends/reference/workloads/Debug.cpp
index d1c9fdd..09a0dfc 100644
--- a/src/backends/reference/workloads/Debug.cpp
+++ b/src/backends/reference/workloads/Debug.cpp
@@ -23,7 +23,7 @@
     const unsigned int numElements = inputInfo.GetNumElements();
     const TensorShape& inputShape = inputInfo.GetShape();
 
-    unsigned int strides[numDims];
+    std::vector<unsigned int> strides(numDims, 0);
     strides[numDims - 1] = inputShape[numDims - 1];
 
     for (unsigned int i = 2; i <= numDims; i++)