* NuttX cmake

* px4_macros:Pass the stringified predicate as second arg to static assert

   CC_ASSERT mapes to the c++ static_assert or provides the same
   funtionality for c via the other macros. The c++ static assert
   takes 2 argumants the prdicate and a message. This fixes the
   lacking second argument.

* Updated nuttx and apps submodule to upstream nuttx 7.21+==master

   This is the latest uptake of upstream nuttx and apps.

* ROMFS generate with xxd instead of objcopy

* delete nuttx-patches

* NuttX update submodules to latest px4_nuttx-master

* fix nuttx apps and board dependency

* docker_run update to latest container 2017-08-29

* cmake ROMFS portable sed usage

* NuttX update submodules to latest px4_nuttx-master

We are running out of flash space in AeroFC so a cleanup is necessary.

Tools not used in Aero RTF, INAV, fixed wing control, vtol control and
unused libs was removed.

before
$ size build_aerofc-v1_default/src/firmware/nuttx/firmware_nuttx
   text    data     bss     dec     hex filename
 956880    3524   14608  975012   ee0a4 firmware_nuttx

after
$ size build_aerofc-v1_default/src/firmware/nuttx/firmware_nuttx
   text    data     bss     dec     hex filename
 832200    3508   14616  850324   cf994 build_aerofc-v1_default/src/firmware/nuttx/firmware_nuttx

There's no USB, don't bring it in.

Measure the battery voltage of Aero RTF kit will be done by FPGA
and read by AeroFC using I2C bus.

The protocol is a little bit odd, it have different I2C slave
address for each "register", in future the FPGA RTL will
have a protocol more similar to other I2C sensors.

Also Aero RTF don't have a ADC line to measure current consumption.

The provided versioning information is the same, except for some additions,
like OS version (which still need to be implemented on NuttX).

* Low impact changes from path_cleanup branch.

This is a step towards minimizing the diff with path_cleanup branch.

* Update ecl.

* Revert matrix update.

* Revert ecl and matrix.

* Update sitl gazebo.

* Revert sitl_gazebo and matrix changes.

This reverts commit 699b6a2c.

* Use DriverFramework as a PX4 module

Targets wanting to use DriverFramework must add

   lib/DriverFramework/framework

to their config file.

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

* Removed spurious code

No need to add if check before for loop

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

* Added DriverFramework to NuttX configs

Added lib/DriverFramework/firmware to nuttx configs

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

* Updated src/lib/DriverFramework

* Removed DF_TARGET and __DF_${OS} defines

These are now handled inside DriverFramework

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

* Updated DriverFramework

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

* Restored __DF_${OS}

The include files in DriverFramwork need to know the target OS.

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