glib-2.0: Add GenericArray.find_custom() as variant of find_with_equal_func()
glib-2.0: Add GenericArray.find_custom() as variant of find_with_equal_func()

This allows the needle to be a different type as the actual element type.
The implementation of ArraySearchFunc<G,T> is more customizable this way.

frida/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala,GNOME/vala,frida/vala