Fix build on FreeBSD by including <array>.

Summary:
latte-dock-0.8.0/app/dock/dockview.h:367:44:
    error: implicit instantiation of undefined template 'std::__1::array<QMetaObject::Connection, 4>'
    std::array<QMetaObject::Connection, 4> connectionsManagedLayout;
                                           ^

Reviewers: #freebsd, mvourlakos, davidedmundson

Reviewed By: davidedmundson

Subscribers: plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D14534

app/dock/dockview.h

@@ -28,6 +28,8 @@
 #include "../plasmaquick/configview.h"
 #include "../../liblattedock/dock.h"
 
+#include <array>
+
 #include <QQuickView>
 #include <QQmlListProperty>
 #include <QMenu>