[Gemspec] Fix for Ruby 2.0.0-p0
[Gemspec] Fix for Ruby 2.0.0-p0

See https://bugs.ruby-lang.org/issues/6702

Ashton-W/CocoaPods,vivekshukla-mob-ibtech/Repository,mglidden/CocoaPods,mglidden/CocoaPods,mglidden/CocoaPods,orta/CocoaPods,ashfurrow/CocoaPods,segiddins/CocoaPods