Correct module_lib scope name

The module_lib scope should be called module-lib in order to pick up
the latest filegroup. Without it the API lint does not use a baseline
and so reports issues with released and unchangeable APIs.

It is also needed for the correct dist path.

Test: m update-api
Bug: 155164730
Change-Id: I7dbafd7164d5da600ca45c39a7f93a5a40027a1f