For native functions, include the symbol name in object inspection #2
Description
When objects are inspected recursively (i.e. in js_inspect_recursive()), only NativeFn is printed for native functions. It would be nice to include the symbol name.
This is not trivial because the code must be compiled with certain flags for dladdr() to be able to return the symbol name. And it's also non-portable. The "dladdr" branch includes some experimental work.