Fix reftests.
Fix reftests.

`dirname()` now returns a `&'a [u8]` instead of a `Path`, which was serialized
to `[ 1 2 3 4 5 ]`.

aweinstock314/servo,splav/servo,rentongzhang/servo,dmarcos/servo,ConnorGBrewster/servo,AnthonyBroadCrawford/servo,froydnj/servo,rixrix/servo,akosel/servo,tempbottle/servo,boghison/servo,cbrewster/servo,notriddle/servo,karlito40/servo,fiji-flo/servo,steveklabnik/servo,youprofit/servo,shrenikgala/servo,tschneidereit/servo,Shraddha512/servo,s142857/servo,jimberlage/servo,ConnorGBrewster/servo,Adenilson/prototype-viewing-distance,WriterOfAlicrow/servo,paulrouget/servo,meh/servo,A-deLuna/servo,srbhklkrn/SERVOENGINE,AnthonyBroadCrawford/servo,emilio/servo,rixrix/servo,dagnir/servo,snf/servo,saratang/servo,chotchki/servo,paulrouget/servo,SimonSapin/servo,owaspjocur/servo,mt2d2/servo,CJ8664/servo,KiChjang/servo,jimberlage/servo,owaspjocur/servo,juzer10/servo,deokjinkim/servo,KiChjang/servo,avadacatavra/servo,WriterOfAlicrow/servo,emilio/servo,hyowon/servo,runarberg/servo,cbrewster/servo,upsuper/servo,ruud-v-a/servo,metajack/servo,sadmansk/servo,anthgur/servo,youprofit/servo,echochamber/servo,paulrouget/servo,pyfisch/servo,tafia/servo,anthgur/servo,dvberkel/servo,boghison/servo,ruud-v-a/servo,ryancanhelpyou/servo,indykish/servo,paulrouget/servo,SimonSapin/servo,bfrohs/servo,rixrix/servo,KiChjang/servo,kindersung/servo,juzer10/servo,szeged/servo,snf/servo,Shraddha512/servo,juzer10/servo,saratang/servo,mt2d2/servo,vks/servo,mrobinson/servo,kindersung/servo,dvberkel/servo,chotchki/servo,zentner-kyle/servo,wpgallih/servo,aweinstock314/servo,s142857/servo,akosel/servo,tempbottle/servo,dhananjay92/servo,hyowon/servo,ConnorGBrewster/servo,luniv/servo,s142857/servo,brendandahl/servo,Aalhad/CanvasRenderingContext2DMozilla,nrc/servo,DominoTree/servo,eddyb/servo,Aalhad/CanvasRenderingContext2DMozilla,chotchki/servo,bfrohs/servo,vks/servo,brendandahl/servo,samfoo/servo,thiagopnts/servo,fiji-flo/servo,jimberlage/servo,notriddle/servo,jimberlage/servo,mbrubeck/servo,avadacatavra/servo,saratang/servo,dmarcos/servo,huonw/servo,tschneidereit/servo,peterjoel/servo,zhangjunlei26/servo,nrc/servo,chotchki/servo,CJ8664/servo,GreenRecycleBin/servo,eddyb/servo,splav/servo,runarberg/servo,saneyuki/servo,ryancanhelpyou/servo,GreenRecycleBin/servo,emilio/servo,bjwbell/servo,saneyuki/servo,ConnorGBrewster/servo,WriterOfAlicrow/servo,evilpie/servo,splav/servo,zentner-kyle/servo,chotchki/servo,ruud-v-a/servo,RenaudParis/servo,larsbergstrom/servo,eddyb/servo,saratang/servo,nick-thompson/servo,splav/servo,saneyuki/servo,ruud-v-a/servo,deokjinkim/servo,wpgallih/servo,sadmansk/servo,jimberlage/servo,GyrosOfWar/servo,rentongzhang/servo,michaelwu/servo,notriddle/servo,notriddle/servo,hyowon/servo,avadacatavra/servo,paulrouget/servo,saneyuki/servo,deokjinkim/servo,upsuper/servo,zhangjunlei26/servo,DominoTree/servo,wpgallih/servo,pyecs/servo,g-k/servo,pyfisch/servo,SimonSapin/servo,KiChjang/servo,szeged/servo,s142857/servo,seanmonstar/servo,SimonSapin/servo,paulrouget/servo,dvberkel/servo,saratang/servo,mattnenterprise/servo,bfrohs/servo,nick-thompson/servo,runarberg/servo,DominoTree/servo,mrobinson/servo,hyowon/servo,srbhklkrn/SERVOENGINE,evilpie/servo,paulrouget/servo,metajack/servo,wartman4404/servo,luniv/servo,wpgallih/servo,meh/servo,runarberg/servo,indykish/servo,pyecs/servo,ConnorGBrewster/servo,caldwell/servo,GyrosOfWar/servo,saneyuki/servo,dmarcos/servo,DominoTree/servo,rixrix/servo,Adenilson/prototype-viewing-distance,SimonSapin/servo,nerith/servo,cbrewster/servo,dagnir/servo,walac/servo,pyfisch/servo,pyecs/servo,shrenikgala/servo,zhangjunlei26/servo,aidanhs/servo,boghison/servo,mattnenterprise/servo,mrobinson/servo,mukilan/servo,nerith/servo,tafia/servo,wpgallih/servo,A-deLuna/servo,zhangjunlei26/servo,s142857/servo,bjwbell/servo,huonw/servo,nnethercote/servo,nick-thompson/servo,wpgallih/servo,aidanhs/servo,boghison/servo,jgraham/servo,A-deLuna/servo,AnthonyBroadCrawford/servo,walac/servo,jgraham/servo,zentner-kyle/servo,jdramani/servo,larsbergstrom/servo,mt2d2/servo,SimonSapin/servo,steveklabnik/servo,rentongzhang/servo,zhangjunlei26/servo,CJ8664/servo,tafia/servo,froydnj/servo,WriterOfAlicrow/servo,akosel/servo,mdibaiee/servo,juzer10/servo,snf/servo,nnethercote/servo,bjwbell/servo,hyowon/servo,jdramani/servo,nerith/servo,emilio/servo,dsandeephegde/servo,peterjoel/servo,tschneidereit/servo,GyrosOfWar/servo,mdibaiee/servo,tafia/servo,szeged/servo,wartman4404/servo,pgonda/servo,samfoo/servo,peterjoel/servo,eddyb/servo,eddyb/servo,thiagopnts/servo,dmarcos/servo,mattnenterprise/servo,pyfisch/servo,tempbottle/servo,caldwell/servo,snf/servo,Adenilson/prototype-viewing-distance,GreenRecycleBin/servo,indykish/servo,splav/servo,fiji-flo/servo,srbhklkrn/SERVOENGINE,owaspjocur/servo,dsandeephegde/servo,nnethercote/servo,saneyuki/servo,mt2d2/servo,indykish/servo,aidanhs/servo,splav/servo,dhananjay92/servo,dagnir/servo,zhangjunlei26/servo,eddyb/servo,nrc/servo,dsandeephegde/servo,bfrohs/servo,sadmansk/servo,echochamber/servo,nerith/servo,aidanhs/servo,juzer10/servo,j3parker/servo,avadacatavra/servo,rixrix/servo,youprofit/servo,akosel/servo,dhananjay92/se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amani/servo,pyecs/servo,g-k/servo,caldwell/servo,wartman4404/servo,pyfisch/servo,dsandeephegde/servo,zentner-kyle/servo,zhangjunlei26/servo,splav/servo,evilpie/servo,rnestler/servo,DominoTree/servo,upsuper/servo,metajack/servo,jlegendary/servo,snf/servo,wartman4404/servo,vks/servo,tschneidereit/servo,nnethercote/servo,aweinstock314/servo,zhangjunlei26/servo,codemac/servo,mukilan/servo,zhangjunlei26/servo,j3parker/servo,michaelwu/servo,cbrewster/servo,nick-thompson/servo,ryancanhelpyou/servo,thiagopnts/servo,deokjinkim/servo,pyfisch/servo,juzer10/servo,A-deLuna/servo,codemac/servo,mukilan/servo,dati91/servo,nnethercote/servo,jdramani/servo,shrenikgala/servo,RenaudParis/servo,A-deLuna/servo,mdibaiee/servo,g-k/servo,canaltinova/servo,pgonda/servo,dati91/servo,srbhklkrn/SERVOENGINE,mattnenterprise/servo,KiChjang/servo,froydnj/servo,jimberlage/servo,fiji-flo/servo,evilpie/servo,indykish/servo,paulrouget/servo,dmarcos/servo,nrc/servo,huonw/servo,vks/servo,rixrix/servo,peterjoel/servo,pgonda/servo,mrobinson/servo,avadacatavra/servo,froydnj/servo,GyrosOfWar/servo,j3parker/servo,emilio/servo,s142857/servo,AnthonyBroadCrawford/servo,owaspjocur/servo,indykish/servo,ruud-v-a/servo,runarberg/servo,GyrosOfWar/servo,kindersung/servo,zentner-kyle/servo,walac/servo,echochamber/servo,pyfisch/servo,meh/servo,mbrubeck/servo,nnethercote/servo,j3parker/servo,bfrohs/servo,dhananjay92/servo,rixrix/servo,nick-thompson/servo,larsbergstrom/servo,pyfisch/servo,walac/servo,szeged/servo,akosel/servo,tempbottle/servo,walac/servo,cbrewster/servo,evilpie/servo,codemac/servo,anthgur/servo,aidanhs/servo,metajack/servo,canaltinova/servo,ConnorGBrewster/servo,vks/servo,KiChjang/servo,bfrohs/servo,jgraham/servo,dsandeephegde/servo,aidanhs/servo,canaltinova/servo,indykish/servo,thiagopnts/servo,luniv/servo,KiChjang/servo,notriddle/servo,AnthonyBroadCrawford/servo,CJ8664/servo,Adenilson/prototype-viewing-distance,mukilan/servo,tschneidereit/servo,seanmonstar/servo,dati91/servo,saneyuki/servo,emilio/servo,A-deLuna/servo,tafia/servo,karlito40/servo,canaltinova/servo,anthgur/servo,mukilan/servo,upsuper/servo,upsuper/servo,dmarcos/servo,tempbottle/servo,deokjinkim/servo,dsandeephegde/servo,RenaudParis/servo,canaltinova/servo,ryancanhelpyou/servo,youprofit/servo,pyfisch/servo,pgonda/servo,evilpie/servo,rnestler/servo,dati91/servo,pyecs/servo,ryancanhelpyou/servo,mdibaiee/servo,peterjoel/servo,GreenRecycleBin/servo,GyrosOfWar/servo,kindersung/servo,RenaudParis/servo,nnethercote/servo,ruud-v-a/servo,aweinstock314/servo,Aalhad/CanvasRenderingContext2DMozilla,nick-thompson/servo,KiChjang/servo,mdibaiee/servo,mt2d2/servo,mattnenterprise/servo,pgonda/servo,brendandahl/servo,sadmansk/servo,steveklabnik/servo,AnthonyBroadCrawford/servo