Add wayland-server as a dependency to wayland-egl

I don't know if wayland-egl doesn't link to wayland-server anymore or if
these symbols are not inlined anymore, but we need to link to
wayland-server for mesa 9.2

Change-Id: Id2094fc3d7d6703a356a542cb8cfd88d36ca6578
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>