Update submodule Mavlink v2.0 to latest Sun Nov 25 07:37:28 EST 2018
Update submodule Mavlink v2.0 to latest Sun Nov 25 07:37:28 EST 2018

    - Mavlink v2.0 in PX4/Firmware (d1dc8e440912e7918465163195b73531138e1e8c): https://github.com/mavlink/c_library_v2/commit/6203e2b64395cfa416b9321f633bc3256a79f722
    - Mavlink v2.0 current upstream: https://github.com/mavlink/c_library_v2/commit/7c47254ddc8bf70eb5e82b4c2142a3faa4fa5780
    - Changes: https://github.com/mavlink/c_library_v2/compare/6203e2b64395cfa416b9321f633bc3256a79f722...7c47254ddc8bf70eb5e82b4c2142a3faa4fa5780

    7c47254 2018-11-21 PX4BuildBot - autogenerated headers for rev https://github.com/mavlink/mavlink/tree/aa72b9e9806854ee822eb2fb4c70c26216113141

Aerotenna/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,acfloria/Firmware,acfloria/Firmware,PX4/Firmware,dagar/Firmware,Aerotenna/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware,PX4/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,PX4/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,Aerotenna/Firmware,acfloria/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,dagar/Firmware,PX4/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,krbeverx/Firmware,krbeverx/Firmware,krbeverx/Firmware,acfloria/Firmware,dagar/Firmware,acfloria/Firmware,PX4/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,acfloria/Firmware,PX4/Firmware,Aerotenna/Firmware,krbeverx/Firmware