Update submodule ecl to latest Tue May 12 00:39:54 UTC 2020
Update submodule ecl to latest Tue May 12 00:39:54 UTC 2020

    - ecl in PX4/Firmware (286bf4f0b911fcc040788117ea79c432f6a95a83): https://github.com/PX4/ecl/commit/97b437233e6aad5ddb8a4511697a38ced7bc9b87
    - ecl current upstream: https://github.com/PX4/ecl/commit/03191847f9c162dedc2cb45ff775b75cbc9c8b36
    - Changes: https://github.com/PX4/ecl/compare/97b437233e6aad5ddb8a4511697a38ced7bc9b87...03191847f9c162dedc2cb45ff775b75cbc9c8b36

    0319184 2020-05-11 kritz - Fix ev_pos_obs_var(1) entry (#809)
440383f 2020-05-09 Kamil Ritz - Increase matrix library usage and remove white line

acfloria/Firmware,acfloria/Firmware,krbeverx/Firmware,PX4/Firmware,krbeverx/Firmware,PX4/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,PX4/Firmware,PX4/Firmware,acfloria/Firmware,krbeverx/Firmware,krbeverx/Firmware,acfloria/Firmware,krbeverx/Firmware,acfloria/Firmware,PX4/Firmware,acfloria/Firmware,PX4/Firmware