Implement IProfile Get and GetBase (#266)

* implement IProfile Get(Base)

* use default user

* changed userid

Ryujinx.HLE/OsHle/Profile.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.OsHle
+{
+    public struct Profile
+    {
+        public string Username;
+        public string UserId;
+    }
+}