Cleaning up compile

qgroundcontrol.pro

src/libs/qextserialport/qextserialenumerator.h

src/libs/qextserialport/qextserialenumerator_osx.cpp

src/libs/qextserialport/qextserialenumerator_unix.cpp

src/libs/qextserialport/qextserialenumerator_win.cpp

src/libs/utils/qtcolorbutton.cpp

src/libs/utils/utils_external.pri