This brings in many of the changes from the PX4 fork on ATLFLight.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The dspal headers were moved to a github organization.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Refacored ADCSIM
Compilation succeeds. Link not yet fixed.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Refacored ADCSIM
Compilation succeeds. Link not yet fixed.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

-move uavcan submodule to src/modules/uavcan/libuavcan
-adding libuavcan as a subdirectory simplifies inheriting all compile
flags and include paths

The latest version of Eigen is required to build with the Hexagon
7.4 toolchain. Only certain C++11 features are supported and the
latest version if Eigen provides these tests. A patch is required
to add support for the Hexagon compiler.

These changes force the sync and then update of eigen and allow it
to be patched for qurt.

The eigen-3.2 submodule was removed as it is no longer needed by the
qurt build with the updated toolchain.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Added generation of build_git_version.h

Added separate src/lib/eigen-3.2 dir for qurt (new submodule)

Added patching of eigen-3.2 for qurt (compiler has issue with Complex)

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

The DSPAL headers are required to build for qurt. When we move to
a cmake build system, the DSPAL headers can be conditionally included.

Signed-off-by: Mark Charlebois <charlebm@gmail.com>

Mavlink is now a git submodule because auto generated header files are
available at https://github.com/mavlink/c_library