Adds warning on darwin platform when ARCHFLAGS not set.
Adds warning on darwin platform when ARCHFLAGS not set.

markneville/nupic,pap/nupic,numenta/nupic,darshanthaker/nupic,vamsirajendra/nupic,badlogicmanpreet/nupic,loretoparisi/nupic,arhik/nupic,GeraldLoeffler/nupic,breznak/nupic,marionleborgne/nupic,blueburningcoder/nupic,blueburningcoder/nupic,vitaly-krugl/nupic,badlogicmanpreet/nupic,elkingtonmcb/nupic,glorizen/nupic,mcanthony/nupic,alfonsokim/nupic,EricSB/nupic,virneo/nupic,fergalbyrne/nupic,numenta-ci/nupic,BeiLuoShiMen/nupic,rhyolight/nupic,wanghaven/nupic,fergalbyrne/nupic,SaganBolliger/nupic,fergalbyrne/nupic,cngo-github/nupic,allanino/nupic,sambitgaan/nupic,glorizen/nupic,GeraldLoeffler/nupic,virneo/nupic,badlogicmanpreet/nupic,markneville/nupic,lscheinkman/nupic,ywcui1990/nupic,BoltzmannBrain/nupic,subutai/nupic,blueburningcoder/nupic,darshanthaker/nupic,scottpurdy/nupic,akhilaananthram/nupic,mcanthony/nupic,metaml/nupic,runt18/nupic,rhyolight/nupic,cogmission/nupic,eranchetz/nupic,go-bears/nupic,allanino/nupic,arhik/nupic,chanceraine/nupic,cngo-github/nupic,passiweinberger/nupic,neuroidss/nupic,breznak/nupic,subutai/nupic,ben-hopps/nupic,wanghaven/nupic,GeraldLoeffler/nupic,numenta/nupic,EricSB/nupic,pap/nupic,arhik/nupic,cngo-github/nupic,glorizen/nupic,metaml/nupic,neuroidss/nupic,sambitgaan/nupic,neuroidss/nupic,ywcui1990/nupic,lscheinkman/nupic,allanino/nupic,cogmission/nupic,alfonsokim/nupic,mcanthony/nupic,runt18/nupic,chanceraine/nupic,rayNymous/nupic,go-bears/nupic,runt18/nupic,wanghaven/nupic,rcrowder/nupic,BeiLuoShiMen/nupic,eranchetz/nupic,rhyolight/nupic,go-bears/nupic,vamsirajendra/nupic,scottpurdy/nupic,sambitgaan/nupic,akhilaananthram/nupic,akhilaananthram/nupic,passiweinberger/nupic,chen0031/nupic,virneo/nupic,breznak/nupic,marionleborgne/nupic,jcasner/nupic,loretoparisi/nupic,SaganBolliger/nupic,EricSB/nupic,chen0031/nupic,rcrowder/nupic,passiweinberger/nupic,elkingtonmcb/nupic,brev/nupic,chanceraine/nupic,vitaly-krugl/nupic,numenta-ci/nupic,markneville/nupic,pulinagrawal/nupic,cogmission/nupic,metaml/nupic,ben-hopps/nupic,numenta-ci/nupic,BoltzmannBrain/nupic,marionleborgne/nupic,chen0031/nupic,ben-hopps/nupic,BeiLuoShiMen/nupic,rcrowder/nupic,pap/nupic,eranchetz/nupic,BoltzmannBrain/nupic,scottpurdy/nupic,rayNymous/nupic,darshanthaker/nupic,alfonsokim/nupic,lscheinkman/nupic,loretoparisi/nupic,SaganBolliger/nupic,brev/nupic,vitaly-krugl/nupic,pulinagrawal/nupic,jcasner/nupic,brev/nupic,rayNymous/nupic,numenta/nupic,ywcui1990/nupic,jcasner/nupic,vamsirajendra/nupic,elkingtonmcb/nupic,pulinagrawal/nupic,subutai/nupic