Added Glue for Functions with `mozilla::Range` Parameters

[Redfire75369]

Small change to #433. slice::as_mut_ptr_range gives a Range<*mut T>, which would need to be converted to a reference to be used.

[sagudev]

Would it be possible to also add test for Range?

[Redfire75369]

The errors seem to be caused by a C++ ABI issue, which is annoying, as per usual. The moment the Range<T> passes to C++, all hell breaks loose and the pointer fields point to nonsense.