Make Unix and Windows impls consistent
Make Unix and Windows impls consistent

There are some explicit Send/Sync implementations for Window's types
that don't exist in Unix. While the end result will be the same, I
believe it's clearer if we keep the explicit implementations consistent
by making the os-specific types Send/Sync where needed and possible.

This commit addresses pipe

src/libstd/sys/unix/pipe.rs
unsafe impl Send for UnixListener {}
unsafe impl Sync for UnixListener {}

src/libstd/sys/windows/pipe.rs
unsafe impl Send for UnixStream {}
unsafe impl Sync for UnixStream {}
unsafe impl Send for UnixListener {}
unsafe impl Sync for UnixListener {}
unsafe impl Send for UnixAcceptor {}
unsafe impl Sync for UnixAcceptor {}
unsafe impl Send for AcceptorState {}
unsafe impl Sync for AcceptorState {}

andars/rust,zubron/rust,miniupnp/rust,aneeshusa/rust,GBGamer/rust,carols10cents/rust,andars/rust,bombless/rust,vhbit/rust,untitaker/rust,ejjeong/rust,seanrivera/rust,sae-bom/rust,GBGamer/rust,avdi/rust,mihneadb/rust,rohitjoshi/rust,ruud-v-a/rust,mvdnes/rust,ebfull/rust,zaeleus/rust,l0kod/rust,l0kod/rust,AerialX/rust,aepsil0n/rust,pelmers/rust,robertg/rust,pshc/rust,mihneadb/rust,GBGamer/rust,nwin/rust,graydon/rust,AerialX/rust,aneeshusa/rust,graydon/rust,gifnksm/rust,GBGamer/rust,victorvde/rust,carols10cents/rust,l0kod/rust,TheNeikos/rust,rprichard/rust,ejjeong/rust,cllns/rust,AerialX/rust,mvdnes/rust,mdinger/rust,mdinger/rust,jashank/rust,victorvde/rust,dwillmer/rust,rohitjoshi/rust,bombless/rust,philyoon/rust,robertg/rust,reem/rust,graydon/rust,jroesch/rust,rohitjoshi/rust,vhbit/rust,kwantam/rust,philyoon/rust,mdinger/rust,miniupnp/rust,TheNeikos/rust,carols10cents/rust,KokaKiwi/rust,KokaKiwi/rust,cllns/rust,ejjeong/rust,GBGamer/rust,ejjeong/rust,dwillmer/rust,rohitjoshi/rust,richo/rust,XMPPwocky/rust,pshc/rust,l0kod/rust,krzysz00/rust,andars/rust,XMPPwocky/rust,jroesch/rust,sae-bom/rust,rprichard/rust,l0kod/rust,AerialX/rust-rt-minimal,mihneadb/rust,richo/rust,pelmers/rust,aidancully/rust,seanrivera/rust,krzysz00/rust,ejjeong/rust,rohitjoshi/rust,rprichard/rust,richo/rust,vhbit/rust,jroesch/rust,seanrivera/rust,mahkoh/rust,AerialX/rust-rt-minimal,pshc/rust,zachwick/rust,ruud-v-a/rust,miniupnp/rust,cllns/rust,reem/rust,XMPPwocky/rust,AerialX/rust-rt-minimal,rprichard/rust,l0kod/rust,aepsil0n/rust,l0kod/rust,gifnksm/rust,pshc/rust,zachwick/rust,omasanori/rust,l0kod/rust,richo/rust,philyoon/rust,XMPPwocky/rust,vhbit/rust,mahkoh/rust,nwin/rust,TheNeikos/rust,GBGamer/rust,KokaKiwi/rust,sae-bom/rust,seanrivera/rust,philyoon/rust,bombless/rust,reem/rust,zubron/rust,zachwick/rust,mdinger/rust,jashank/rust,AerialX/rust-rt-minimal,krzysz00/rust,carols10cents/rust,miniupnp/rust,aepsil0n/rust,hauleth/rust,aepsil0n/rust,bombless/rust,gifnksm/rust,krzysz00/rust,aidancully/rust,gifnksm/rust,nwin/rust,aneeshusa/rust,mvdnes/rust,nwin/rust,cllns/rust,mdinger/rust,TheNeikos/rust,mihneadb/rust,victorvde/rust,GBGamer/rust,mihneadb/rust,mihneadb/rust,nwin/rust,carols10cents/rust,avdi/rust,richo/rust,ebfull/rust,victorvde/rust,sae-bom/rust,KokaKiwi/rust,nwin/rust,hauleth/rust,KokaKiwi/rust,jroesch/rust,miniupnp/rust,untitaker/rust,graydon/rust,reem/rust,aneeshusa/rust,jashank/rust,dwillmer/rust,kwantam/rust,graydon/rust,ruud-v-a/rust,AerialX/rust-rt-minimal,reem/rust,aidancully/rust,kwantam/rust,reem/rust,XMPPwocky/rust,seanrivera/rust,andars/rust,ebfull/rust,jashank/rust,ebfull/rust,jroesch/rust,aneeshusa/rust,TheNeikos/rust,mahkoh/rust,zubron/rust,mvdnes/rust,zaeleus/rust,bombless/rust,zubron/rust,hauleth/rust,rohitjoshi/rust,omasanori/rust,ruud-v-a/rust,zachwick/rust,omasanori/rust,andars/rust,miniupnp/rust,krzysz00/rust,zaeleus/rust,AerialX/rust,pshc/rust,gifnksm/rust,vhbit/rust,aepsil0n/rust,KokaKiwi/rust,omasanori/rust,cllns/rust,zubron/rust,robertg/rust,mahkoh/rust,AerialX/rust,nwin/rust,jroesch/rust,vhbit/rust,zubron/rust,carols10cents/rust,mahkoh/rust,gifnksm/rust,mahkoh/rust,zaeleus/rust,jashank/rust,avdi/rust,AerialX/rust,pshc/rust,GBGamer/rust,dwillmer/rust,seanrivera/rust,jroesch/rust,hauleth/rust,zubron/rust,pelmers/rust,aidancully/rust,victorvde/rust,robertg/rust,ebfull/rust,aidancully/rust,jashank/rust,zaeleus/rust,rprichard/rust,pelmers/rust,kwantam/rust,ebfull/rust,kwantam/rust,aepsil0n/rust,untitaker/rust,mvdnes/rust,avdi/rust,untitaker/rust,philyoon/rust,jroesch/rust,miniupnp/rust,zubron/rust,rprichard/rust,nwin/rust,aidancully/rust,XMPPwocky/rust,hauleth/rust,mvdnes/rust,cllns/rust,sae-bom/rust,zachwick/rust,robertg/rust,krzysz00/rust,victorvde/rust,zachwick/rust,vhbit/rust,avdi/rust,bombless/rust,dwillmer/rust,omasanori/rust,kwantam/rust,AerialX/rust-rt-minimal,philyoon/rust,miniupnp/rust,untitaker/rust,ruud-v-a/rust,ejjeong/rust,dwillmer/rust,sae-bom/rust,ruud-v-a/rust,pshc/rust,pelmers/rust,jashank/rust,pshc/rust,zaeleus/rust,robertg/rust,untitaker/rust,jashank/rust,avdi/rust,hauleth/rust,andars/rust,dwillmer/rust,aneeshusa/rust,graydon/rust,TheNeikos/rust,vhbit/rust,richo/rust,mdinger/rust,pelmers/rust,dwillmer/rust,omasanori/rust