Fix warnings about icon assets.

Summary:
I incorrectly sized some assets, as a result, the sample project had some warnings about it when you built. This fixes it.
Closes https://github.com/facebook/yoga/pull/377

Differential Revision: D4515193

Pulled By: dshahidehpour

fbshipit-source-id: 3af6e79a17777bec3798bbf7294af5716f65e37a

YogaKit/YogaKitSample/YogaKitSample.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "group:YogaKitSample.xcodeproj">
+   </FileRef>
+   <FileRef
+      location = "group:Pods/Pods.xcodeproj">
+   </FileRef>
+</Workspace>

YogaKit/YogaKitSample/YogaKitSample/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -45,13 +45,13 @@
     {
       "size" : "57x57",
       "idiom" : "iphone",
-      "filename" : "Yoga-57x57@2x.png",
+      "filename" : "Yoga-57x57@1x.png",
       "scale" : "1x"
     },
     {
       "size" : "57x57",
       "idiom" : "iphone",
-      "filename" : "Yoga-57x57@3x.png",
+      "filename" : "Yoga-57x57@2x.png",
       "scale" : "2x"
     },
     {
@@ -71,4 +71,4 @@
     "version" : 1,
     "author" : "xcode"
   }
-}
+}