Fix make install rules to all examples in QtConnectivity repo

This was highlighted during the testing of the Qt 5.2.0 package.

Change-Id: I94b27f02a6621bccb9f0ce0d0cc184a449014573
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>