[spec] use new Pod::HooksManager in CocoaPods 0.38.0
[spec] use new Pod::HooksManager in CocoaPods 0.38.0

There is detail in "Breaking Change to the Hooks-API" in http://blog.cocoapods.org/CocoaPods-0.38/

jbender/motion-pods,markrickert/motion-cocoapods,HipByte/motion-cocoapods,jjaffeux/motion-cocoapods