Fix gyp build for some macs
Fix gyp build for some macs

DBarney/luvit,rjeli/luvit,DBarney/luvit,sousoux/luvit,boundary/luvit,AndrewTsao/luvit,sousoux/luvit,sousoux/luvit,bsn069/luvit,luvit/luvit,zhaozg/luvit,kaustavha/luvit,GabrielNicolasAvellaneda/luvit-upstream,bsn069/luvit,boundary/luvit,boundary/luvit,kaustavha/luvit,sousoux/luvit,kaustavha/luvit,rjeli/luvit,rjeli/luvit,boundary/luvit,boundary/luvit,connectFree/lev,boundary/luvit,connectFree/lev,zhaozg/luvit,DBarney/luvit,DBarney/luvit,AndrewTsao/luvit,GabrielNicolasAvellaneda/luvit-upstream,rjeli/luvit,AndrewTsao/luvit,luvit/luvit,sousoux/luvit,GabrielNicolasAvellaneda/luvit-upstream,bsn069/luvit,GabrielNicolasAvellaneda/luvit-upstream,sousoux/luvit