Fix an internal soft-timer issue and one CPU case
    
    - Update to the upstream v6.13 + tip of origin/master + onecpu
      branch + revert of 2ce93190
    - Rebuild rng-tools against the latest jitterentropy library
      3.0.2.git.d18d5863 with fixes for an important issue:
      https://github.com/nhorman/rng-tools/pull/123
      https://github.com/smuellerDD/jitterentropy-library/issues/37
    - Add important upstream fixes for the one CPU case (bz 1974132)
    - Revert introducing a new but mostly useless randstat binary
    - A couple of minor code and test fixes
    
    Signed-off-by: Vladis Dronov <vdronov@redhat.com>