iOS build: add various support files

It's unclear why the build fails if we don't add the sample app files as
well.

[Dirk Hohndel: refactored the patches]

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

packaging/ios/subsurface-ios/main.qml

@@ -0,0 +1,40 @@
+import QtQuick 2.6
+import QtQuick.Controls 1.5
+import QtQuick.Dialogs 1.2
+
+ApplicationWindow {
+    visible: true
+    width: 640
+    height: 480
+    title: qsTr("Hello World")
+
+    menuBar: MenuBar {
+        Menu {
+            title: qsTr("File")
+            MenuItem {
+                text: qsTr("&Open")
+                onTriggered: console.log("Open action triggered");
+            }
+            MenuItem {
+                text: qsTr("Exit")
+                onTriggered: Qt.quit();
+            }
+        }
+    }
+
+    MainForm {
+        anchors.fill: parent
+        button1.onClicked: messageDialog.show(qsTr("Button 1 pressed"))
+        button2.onClicked: messageDialog.show(qsTr("Button 2 pressed"))
+    }
+
+    MessageDialog {
+        id: messageDialog
+        title: qsTr("May I have your attention, please?")
+
+        function show(caption) {
+            messageDialog.text = caption;
+            messageDialog.open();
+        }
+    }
+}