Update submodule ecl to latest Mon Aug 17 12:39:41 UTC 2020

- ecl in PX4/Firmware (84aeb53ee5847866ecf7698591f00278d12ba770): ec93490890
    - ecl current upstream: 1e6c6f2d3c
    - Changes: ec93490890...1e6c6f2d3c

    1e6c6f2 2020-08-16 Paul Riseborough - EKF: update all output states when aligning output time horizon filter
3bd9415 2020-07-26 kamilritz - Make delayed output stayed not a member variable
da9bfe4 2020-07-26 kamilritz - Update interface of applyCorrectionsToOuputStates
64ab2b0 2020-08-15 Paul Riseborough - EKF: Only record successful sideslip fusion when states updated
0fa7ef3 2020-08-15 Paul Riseborough - EKF: Use ecl::powf for integer exponents
168dbdf 2020-08-15 Paul Riseborough - EKF: Convert sideslip fusion to use SymPy generated auto-code
06aa78a 2020-08-15 Paul Riseborough - EKF: Only record airspeed fusion event when states are updated
486a461 2020-08-15 Paul Riseborough - EKF: airspeed fusion derivation test comparison cleanup
ede6204 2020-08-15 Paul Riseborough - EKF: airspeed fusion cleanup
a5a43db 2020-08-13 Paul Riseborough - EKF: Convert airspeed fusion to use SymPy generated auto-code
5907e81 2020-08-15 Paul Riseborough - EKF: optflow fusion cleanup
7fa9a19 2020-08-15 Paul Riseborough - EKF: optflow fusion cleanup
0e74f3e 2020-08-15 Paul Riseborough - EKF: optflow fusion cleanup
6e992a1 2020-08-15 Paul Riseborough - EKF: optflow fusion cleanup
1ad042d 2020-08-13 Paul Riseborough - EKF: Use ecl::powf in comparison test
274523b 2020-08-13 Paul Riseborough - EKF: Use ecl::powf for integer exponents
f20a5d8 2020-08-13 Paul Riseborough - EKF: Remove redundant tilt check
1592db8 2020-08-13 Paul Riseborough - EKF: Convert optical flow fusion to use SymPy generated equations
1f386c1 2020-08-15 Paul Riseborough - EKF: Add yaw estimate SymPy generated code files
510d938 2020-08-11 Paul Riseborough - EKF: move yaw estimator derivation into main filter derivation
f89c52e 2020-08-13 Paul Riseborough - EKF: use ecl::powf for integer exponents
0aa2f17 2020-08-13 Paul Riseborough - EKF: Convert GPS yaw observation method to use SymPy generated code (#880)
21cc46e 2020-08-11 Paul Riseborough - EKF: Convert magnetic field observation methods to use SymPy generated code (#879)

src/lib/ecl

@@ -1 +1 @@
-Subproject commit ec934908900b23ee273d1a9f82364b7b38423200
+Subproject commit 1e6c6f2d3ccaed470996c9efe88457299608f1d6