Build with stable version

Now that 3.3.0 stable version is out, build with it instead of
the snapshot (which only pulls from local repository). Also,
update the bazelets to 3.3.0 to fix failing compilation with
3.2. Since we aren't specifying any version it is directly
inferred from the bazelts commit.

Change-Id: I01596e41bbfecfec02331ff2b0a27755a3c1f773