qt5connectivity: the poster example needs no widgets, but it needs quick

qt5connectivity: the poster example needs no widgets, but it needs quick

Adding an upstream patch to fix an autobuild failure.

Upstream commit:
   https://qt.gitorious.org/qt/qtconnectivity/commit/0156038682cc40d44fedfc28dc9b78d1a0e6203b

Fixes:
   http://autobuild.buildroot.net/results/d12/d120355cbb42307d35e59bc4528e973a2b12150e/

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Reviewed-by: Markos Chandras <Markos.Chandras@imgtec.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>