Overload resolution for Activator.CreateInstance

Linker tries to guess the constructor to keep for Activator.CreateInstance by counting the number of parameters passed to the constructor.

Unfortunately, the reflection stack is aware of the `ParamArrayAttribute` which is the mechanism that C# uses to distinguish between `object[]` and `params object[]`. So if any of the constructors has a member with this attribute, the counting logic might not work.

```csharp
Activator.CreateInstance(typeof(Foo), new object[] { 1, 2, 3, 4, 5 });

class Foo
{
// Should be kept
public Foo(int x, params object[] y) => Console.WriteLine(y.Length);
}
```