Add wayland library as explicit package dependency for system-info extension

BUG=https://crosswalk-project.org/jira/browse/XWALK-1381

Signed-off-by: Baptiste DURAND <baptiste.durand@open.eurogiciel.org>
Merge pull request #279 from eurogiciel-oss/XWALK-1381

Add wayland library as explicit package dependency for system-info exten...