Add old logo image.

Riot/Assets/Images.xcassets/MajorUpdate/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Riot/Assets/Images.xcassets/MajorUpdate/old_logo.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "filename" : "old_logo.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "filename" : "old_logo@2x.png",
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "filename" : "old_logo@3x.png",
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Riot/Generated/Images.swift

@@ -64,6 +64,7 @@ internal enum Asset {
     internal static let keyBackupLogo = ImageAsset(name: "key_backup_logo")
     internal static let revealPasswordButton = ImageAsset(name: "reveal_password_button")
     internal static let keyVerificationSuccessShield = ImageAsset(name: "key_verification_success_shield")
+    internal static let oldLogo = ImageAsset(name: "old_logo")
     internal static let cameraCapture = ImageAsset(name: "camera_capture")
     internal static let cameraPlay = ImageAsset(name: "camera_play")
     internal static let cameraStop = ImageAsset(name: "camera_stop")