[Style] Don't use reduce to determine if there are changes

Use a var instead, as per @alloy

lib/cocoapods/installer/user_project_integrator/target_integrator.rb

@@ -65,12 +65,15 @@ module Pod
 
           script_path = target.copy_resources_script_relative_path
           shell_script = %("#{script_path}"\n)
-          phases.reduce(false) do |changes, phase|
+          changes = false
+          phases.each do |phase|
             unless phase.shell_script == shell_script
               phase.shell_script = shell_script
-            end || changes
+              changes = true
             end
           end
+          changes
+        end
 
         # Adds spec libraries to the frameworks build phase of the
         # {TargetDefinition} integration libraries. Adds a file reference to

lib/cocoapods/installer/user_project_integrator/target_integrator/xcconfig_integrator.rb

@@ -18,14 +18,15 @@ module Pod
           # @return [Bool] whether any changes to the project were made.
           #
           def self.integrate(pod_bundle, targets)
-            targets.reduce(false) do |changes, target|
-              target.build_configurations.reduce(false) do |c, config|
-                change = update_to_cocoapods_0_34(pod_bundle, targets)
-                change = set_target_xcconfig(pod_bundle, target, config) || change
-                change || c
-              end || changes
+            changes = false
+            targets.each do |target|
+              target.build_configurations.each do |config|
+                changes = true if update_to_cocoapods_0_34(pod_bundle, targets)
+                changes = true if set_target_xcconfig(pod_bundle, target, config)
               end
             end
+            changes
+          end
 
           private
 
@@ -47,7 +48,8 @@ module Pod
           #
           def self.update_to_cocoapods_0_34(pod_bundle, targets)
             sandbox = pod_bundle.sandbox
-            targets.map(&:project).uniq.reduce(false) do |changes, project|
+            changes = false
+            targets.map(&:project).uniq.each do |project|
               file_refs = project.files.select do |file_ref|
                 path = file_ref.path.to_s
                 if File.extname(path) == '.xcconfig'
@@ -63,8 +65,9 @@ module Pod
                 end
               end
 
-              changes || !file_refs.empty?
+              changes = true unless file_refs.empty?
             end
+            changes
           end
 
           # Creates a file reference to the xcconfig generated by