[tests] io_test: fixes compile-error (added missing include)
[tests] io_test: fixes compile-error (added missing include)

xzero/x0,christianparpart/x0,xzero/x0,christianparpart/x0,christianparpart/x0,xzero/x0,xzero/x0,xzero/x0,xzero/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0,christianparpart/x0