add AF_* exports to lua
add AF_* exports to lua

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