Mark liblatinime_unittests as unit_test:true to run in presubmit in CI

This will ensure that the target stays green.
Note: we will clean up the explicit unit_tests:true once cc_test default is changed.

Change-Id: I5153ca918e94b370b1f08289118877d209385ba2
Test: presubmit
Bug: 180014759
1 file changed