[Podspec] Restore support for OS X 10.7
[Podspec] Restore support for OS X 10.7

Talked to Brian and the change to make this 10.10 was unintentional.
nchatharoo/Quick,ArthurKK/Quick,ikesyo/Quick,NatashaTheRobot/Quick,DrewKiino/Quick,hwsyy/Quick,dgdosen/Quick,hanangellove/Quick,hanangellove/Quick,mrackwitz/Quick,mokagio/Quick,marciok/Quick,jasonchaffee/Quick,marciok/Quick,Quick/Quick,phatblat/Quick,jeffh/Quick,jeffh/Quick,DrewKiino/Quick,ikesyo/Quick,ichu501/Quick,luzefeng/Quick,nchatharoo/Quick,mokagio/Quick,jondwillis/Quick,phatblat/Quick,modocache/personal-fork-of-Quick,NatashaTheRobot/Quick,mrackwitz/Quick,modocache/personal-fork-of-Quick,wjszf/Quick,cerberillo/Quick,pedrovereza/Quick,romankl/Quick,jahilliard/Quick,jahilliard/Quick,fullstackclub/Quick,DanielAsher/Quick,msdgwzhy6/Quick,marciok/Quick,Quick/Quick,Sweefties/Quick,Quick/Quick,paulyoung/Quick,ashfurrow/Quick,hwsyy/Quick,phatblat/Quick,ashfurrow/Quick,dcaunt/Quick,wjszf/Quick,cerberillo/Quick,Sweefties/Quick,ArthurKK/Quick,romankl/Quick,BlessNeo/Quick,paulyoung/Quick,ichu501/Quick,jeffh/Quick,BlessNeo/Quick,pedrovereza/Quick,pcantrell/Quick,luzefeng/Quick,dgdosen/Quick,phatblat/Quick,fullstackclub/Quick,dcaunt/Quick,DanielAsher/Quick,ikesyo/Quick,jasonchaffee/Quick,pcantrell/Quick,Quick/Quick,mokagio/Quick,paulyoung/Quick,jondwillis/Quick,jasonchaffee/Quick,pengleelove/Quick,msdgwzhy6/Quick,pengleelove/Quick,dgdosen/Quick