by comparing the configuration options that cmake reports
from the cache with the ones from the current build

cleanup nuttx_, _default targets

This means that we can use the normal host scheduling (not lockstep) for
the unit tests.

In the future we might add unit tests using lockstep as well.

 - add to AddressSanitizer and UndefinedBehaviorSanitizer to CMAKE_BUILD_TYPE options
 - handle environment variable helpers outside of CMake
 - add -O1 optimization
 - cleanup whitespace

* jenkins: decrease VTOL mission alt and FW mission use simple land wps
* startup: decrease min airspeed scaling factor for landing
* jenkins: FW mission include loiter_to_alt cmd

 - exclude DriverFramework, parameters, libuavcan

It seems that on linux only inside a makefile the parameter after the echo
command gets printed if no single quoted sting comes afterwards so I had
to switch to single quotes such that I can use the parameter.

Force interpretation of backslash escapes with the parameter -e of echo.
Switch to a lighter blue because on certain terminals default blue is
hard to read on black background.

 - px4_add_module now requires MAIN
 - px4_add_library doesn't automatically link

The calls have not been updated as the CI target has been.

This is required for generating documentation