lib: luvit: uv: fix setup of stdout/stderr
lib: luvit: uv: fix setup of stdout/stderr

This is an obvious fat finger by me. I was probably so excited to have
Windows tests passing that I just committed it! :)

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