rename files and add navio target

Makefile

cmake/configs/posix_navio2_release.cmake

src/drivers/navio_sysfs_pwm_out/CMakeLists.txt

src/drivers/navio_sysfs_pwm_out/navio_sysfs_pwm_out.cpp

src/drivers/navio_sysfs_rc_in/CMakeLists.txt

src/drivers/navio_sysfs_rc_in/navio_sysfs_rc_in.cpp

src/lib/version/version.h