Added acknowledgements_path to TargetDefinition class

lib/cocoapods/installer.rb

@@ -87,8 +87,7 @@ module Pod
       target_installers.each do |target_installer|
         pods_for_target = activated_pods_by_target[target_installer.target_definition]
         target_installer.install!(pods_for_target, @sandbox)
-        acknowledgements_path = config.project_pods_root +
-                                "#{target_installer.target_definition.label}-Acknowledgements"
+        acknowledgements_path = target_installer.target_definition.acknowledgements_path
         Generator::Acknowledgements.new(target_installer.target_definition,
                                         pods_for_target).save_as(acknowledgements_path)
       end

lib/cocoapods/podfile.rb

@@ -61,6 +61,10 @@ module Pod
         end
       end
 
+      def acknowledgements_path
+        config.project_pods_root + "#{label}-Acknowledgements"
+      end
+
       # Returns a path, which is relative to the project_root, relative to the
       # `$(SRCROOT)` of the user's project.
       def relative_to_srcroot(path)