there is a commandline tool to see what archs are included into binary.
cd /Users/.../Downloads/comscore-master/comScore.framework/Versions/Current
$ ls
Headers Resources comScore
$ file comScore
comScore: Mach-O universal binary with 3 architectures
comScore (for architecture armv7): current ar archive random library
comScore (for architecture armv7s): current ar archive random library
comScore (for architecture i386): current ar archive random library
I think that you can build any number or archs you want and then merge them using lipo tool into one static library and bundle it like framework.