rename csharp code

Summary: new name

Reviewed By: splhack

Differential Revision: D4247106

fbshipit-source-id: 6e1097de104f3a011c78ae65b33e57865b007711

csharp/Facebook.Yoga/project.json

@@ -0,0 +1,14 @@
+{
+  "language": "en",
+  "version": "3.0.0-*",
+
+  "dependencies": {
+    "NETStandard.Library": "1.6.0"
+  },
+
+  "frameworks": {
+    "netstandard1.6": {
+      "imports": "dnxcore50"
+    }
+  }
+}