Changed minimum deployment target to iOS 9.

This ensures the launch storyboard doesn’t generate an error, and is
line with Xamarin policy for samples.

src/Mobile/eShopOnContainers/eShopOnContainers.iOS/Info.plist

@@ -20,7 +20,7 @@
 		<string>UIInterfaceOrientationLandscapeRight</string>
 	</array>
 	<key>MinimumOSVersion</key>
-	<string>6.0</string>
+	<string>9.0</string>
 	<key>CFBundleDisplayName</key>
 	<string>eShopOnContainers</string>
 	<key>CFBundleIdentifier</key>