Update Swifter.podspec

Swifter.podspec

@@ -10,6 +10,6 @@ Pod::Spec.new do |s|
   s.osx.deployment_target = "10.9"
   s.tvos.deployment_target = "9.0"
   s.source                = { :git => "https://github.com/httpswift/swifter.git", :tag => "1.4.6" }
-  s.source_files          = 'Sources/*.{swift}'
+  s.source_files          = 'XCode/Sources/*.{swift}'
 
-end
+end