Manually integrated Jim's changes from integrate2_jim branch

cmake/configs/posix_eagle_release.cmake

cmake/toolchains/Toolchain-arm-linux-gnueabihf.cmake

src/firmware/qurt/CMakeLists.txt

src/modules/muorb/krait/uORBKraitFastRpcChannel.cpp

src/modules/muorb/krait/uORBKraitFastRpcChannel.hpp

src/modules/systemlib/param/param_shmem.c

src/platforms/posix/px4_layer/drv_hrt.c

src/platforms/px4_posix.h

src/platforms/px4_tasks.h

src/platforms/qurt/dspal/dspal_stub.c

src/platforms/qurt/px4_layer/main.cpp

src/platforms/qurt/px4_layer/px4_qurt_tasks.cpp

src/platforms/qurt/px4_layer/shmem_qurt.c

src/systemcmds/mixer/mixer.cpp