Updated cmake_hexagon and all the associated files that use it

cmake/configs/posix_eagle_default.cmake

cmake/configs/posix_eagle_hil.cmake

cmake/configs/posix_eagle_muorb.cmake

cmake/configs/posix_eagle_release.cmake

cmake/configs/qurt_eagle_default.cmake

cmake/configs/qurt_eagle_hello.cmake

cmake/configs/qurt_eagle_hil.cmake

cmake/configs/qurt_eagle_muorb.cmake

cmake/configs/qurt_eagle_release.cmake

cmake/configs/qurt_eagle_test.cmake

cmake/configs/qurt_eagle_travis.cmake

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

src/firmware/posix/CMakeLists.txt

src/firmware/qurt/CMakeLists.txt

src/platforms/qurt/stubs/stubs_posix.c