Answering my own question to help others that may run into this problem.
After a lot of research I found that I needed to link adobe flashbuilder to the ios sdk.
Right-Click on your project in flashbuilder -> Properties -> Flex Build Packaging -> Apple iOS -> Native Extensions Tab. There is a text field for the location of the Apple iOS SDK. I found my sdk to at:
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk