Fix template substitution with const

[HGuillemet]

template <typename T>
class X {
 public:
    X(const T*) {}
};

If you instantiate this template with int *, then the resulting type should be int * const * and not const int **.
But the parser produces this, with a new Info("X<int *>").pointerTypes("XI"):

    public XI(@Cast("const int**") PointerPointer arg0) { super((Pointer)null); allocate(arg0); }
    private native void allocate(@Cast("const int**") PointerPointer arg0);

Leading to JNI compile error since the constructor expects a int * const*. This PR tries to fix this. It seems to do the trick. The parser now emits:

    public XI(@Cast("int**") PointerPointer arg0) { super((Pointer)null); allocate(arg0); }
    private native void allocate(@Cast("int**") PointerPointer arg0);

The const doesn't appear in the cast at all, but at least we have a better chance to compile the JNI. I'm not sure it generalizes well. Can we do something better ?

[saudet]

Info.constPointer currently gets ignored in this case, yes. It's complicated, but if this fix works for that template that's fine for now. We can do something about Info.constPointer later, I think that's OK, yes. Did you make sure it doesn't break anything in the presets though?

[HGuillemet]

Just finished to reparse (almost) all presets. Only changes are for pytorch where const is removed from @Cast in the following declarations:

In BlockArrayRef.java:

public native @Cast("torch::jit::Block**") PointerPointer data();

In ValueArrayRef.java

public native @Cast("torch::jit::Value**") PointerPointer data();

JNI still compiles.