This links:
platform :ios, '8.0'
pod 'Ambly', :git => 'https://github.com/mfikes/ambly', :branch => 'jsc-c-api'
pod 'Ejecta', :git => 'https://github.com/swannodette/Ejecta', :branch => 'podspec'
Below uses my fork of your Ejecta, and also links. I mucked with getting rid of the JavaScriptCore framework and renaming the static lib so it can be included. (This works, but it is not clear if needed over just using your fork).