mavlink/qgroundcontrol — pull request #194 by senden9 (2012-11-01 18:13:56+00:00)
Title: Add unistd.h in libs/thirdParty/qserialport/src/posix/qserialportnative_...

...posix.cpp.

Without this change, the program can not be built on Linux.
Before the change It said:
```../qgroundcontrol/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp:105:3: error: '::close' has not been declared
../qgroundcontrol/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp:208:21: error: '::read' has not been declared
../qgroundcontrol/libs/thirdParty/qserialport/src/posix/qserialportnative_posix.cpp:219:21: error: '::write' has not been declared```