[PodTarget] Use label to scope build dir

lib/cocoapods/target/pod_target.rb

@@ -257,7 +257,7 @@ module Pod
     # @return [String] The absolute path to the configuration build dir
     #
     def configuration_build_dir(dir = '$CONFIGURATION_BUILD_DIR')
-      "#{dir}/#{pod_name}#{scoped? ? "/#{scope_suffix}" :  ''}"
+      "#{dir}/#{label}"
     end
 
     private

spec/unit/generator/xcconfig/aggregate_xcconfig_spec.rb

@@ -205,11 +205,11 @@ module Pod
             end
 
             it 'adds the framework build path to the xcconfig, with quotes, as framework search paths' do
-              @xcconfig.to_hash['FRAMEWORK_SEARCH_PATHS'].should == '$(inherited) "$CONFIGURATION_BUILD_DIR/BananaLib/iOS" "$CONFIGURATION_BUILD_DIR/OrangeFramework/iOS"'
+              @xcconfig.to_hash['FRAMEWORK_SEARCH_PATHS'].should == '$(inherited) "$CONFIGURATION_BUILD_DIR/BananaLib-iOS" "$CONFIGURATION_BUILD_DIR/OrangeFramework-iOS"'
             end
 
             it 'adds the framework header paths to the xcconfig, with quotes, as local headers' do
-              expected = '$(inherited) -iquote "$CONFIGURATION_BUILD_DIR/BananaLib/iOS/BananaLib.framework/Headers" -iquote "$CONFIGURATION_BUILD_DIR/OrangeFramework/iOS/OrangeFramework.framework/Headers"'
+              expected = '$(inherited) -iquote "$CONFIGURATION_BUILD_DIR/BananaLib-iOS/BananaLib.framework/Headers" -iquote "$CONFIGURATION_BUILD_DIR/OrangeFramework-iOS/OrangeFramework.framework/Headers"'
               @xcconfig.to_hash['OTHER_CFLAGS'].should == expected
             end
           end

spec/unit/target/pod_target_spec.rb

@@ -163,9 +163,9 @@ module Pod
 
       it 'returns the path for the CONFIGURATION_BUILD_DIR build setting' do
         @pod_target.configuration_build_dir.should == '$CONFIGURATION_BUILD_DIR/BananaLib'
-        @pod_target.scoped.first.configuration_build_dir.should == '$CONFIGURATION_BUILD_DIR/BananaLib/Pods'
+        @pod_target.scoped.first.configuration_build_dir.should == '$CONFIGURATION_BUILD_DIR/BananaLib-Pods'
         @pod_target.configuration_build_dir('$PODS_SHARED_BUILD_DIR').should == '$PODS_SHARED_BUILD_DIR/BananaLib'
-        @pod_target.scoped.first.configuration_build_dir('$PODS_SHARED_BUILD_DIR').should == '$PODS_SHARED_BUILD_DIR/BananaLib/Pods'
+        @pod_target.scoped.first.configuration_build_dir('$PODS_SHARED_BUILD_DIR').should == '$PODS_SHARED_BUILD_DIR/BananaLib-Pods'
       end
     end