project-lakitu: lakitu: rename overlay-lakitu to project-lakitu

To make the commit history clear and easy to understand, the only
thing this change does is renaming the directory. More meaningful work
will be done by following commits.

BUG=b/170716822
TEST=See the 'TEST=' section of the last change in this series of
     changes.
RELEASE_NOTE=None

Change-Id: Ib392757de0fc11942433edda3211a0440a782376
478 files changed