Move integration library linking outside of target integrator

The target integrator is only run when libraries are being integrated 
with user projects.  The Pods integration library needs to be 
updated, linked with the spec libraries, regardless of user 
project integration.
Quote copy resources scripts
Manually build dependencies with xcodebuild

The xcodebuild -target <target> invocation does not support implicit 
dependencies.  Therefor building the Pods integration library fails 
because none of the spec libraries are built.  Building a scheme 
results in proper implicit dependency resolution, but there are no 
schemes created in the integration tests.  Just walk the list of 
spec libraries and manually build all dependencies before building 
the Pod integration library.
Configure integration targets without specs