x11/squeekboard: pet stage-qa

Error: /usr/local/bin/squeekboard-real is linked to /usr/local/lib/libgdk_pixbuf-2.0.so.0 from graphics/gdk-pixbuf2 but it is not declared as a dependency
Warning: you need USE_GNOME+=gdkpixbuf2
Warning: /usr/ports/x11/squeekboard/pkg-message not in UCL format, will be shown on initial install only.
Warning: See https://www.freebsd.org/doc/en/books/porters-handbook/pkg-files.html#porting-message