It is important to enable Bitcode in all libraries if the app is going to enable Bitcode. These scripts check each static library for Bitcode and echo a string which shows up as a warning in the build log. It is an easy way to always check that the dependencies have what is needed.
Place check_bitcode.sh in your project directory. Then add a Run Script in Build Phasese with the script named RunScript.sh. Name that new section as Check Bitcode and run the build. It may be necessary to make the shell script executble using chmod u+x check_bitcode.sh on the command-line.