xcodebuild changed some of the values

test:

1. Add CUSTOM_BUNDLE_IDENTIFIER and CUSTOM_PRODUCT_NAME under the user defined section of build settings.
2. Add a .xcconfig file to the project with CUSTOM_PRODUCT_NAME, and CUSTOM_BUNDLE_IDENTIFIER set to the nominal values.
3. Set the product name to ${CUSTOM_PRODUCT_NAME} and bundle name to ${CUSTOM_BUNDLE_IDENTIFIER} in the info.plist.
4. Set the Product Name to ${CUSTOM_PRODUCT_NAME} under build settings.

When I want to change some of the values I create a new xcconfig file, and specify that xcconfig file using the -xcconfig param for xcodebuild. This allows you to change the settings on the fly.