utils.lang.import_._spec: More robust _spec_from_module
utils.lang.import_._spec: More robust _spec_from_module

Python 3.3's importlib internal organization leads to situations when
module code is loaded when almost no module attributes have been set, so
trying to construct a Spec from them is meaningless.  Fall back to
_spec_from_file_location for these cases.

sprymix/importkit