ported vtol module to posix

src/modules/vtol_att_control/standard.cpp

src/modules/vtol_att_control/tailsitter.cpp

src/modules/vtol_att_control/tiltrotor.cpp

src/modules/vtol_att_control/vtol_att_control_main.cpp

src/modules/vtol_att_control/vtol_att_control_main.h

src/modules/vtol_att_control/vtol_type.cpp