Without setting the install name, the copied object will still reference
to the original object, which is not going to work if it is ever moved
out of CBQN directory:
$ otool -L libcbqn.dylib
libcbqn.dylib:
build/obj2/linker-4qa8skka2dk9e991rjom3lns7elgmlak4h98e0bcb0t8os3o6o5/res (compatibility version 0.0.0, current version 0.0.0)
With this change the install name of the dylib object is set to
@rpath/libcbqn.dylib, so it's loaded the same way .so files on Linux
are.