Avoid searching for old nightlies in missing dirs
Avoid searching for old nightlies in missing dirs

These directories may be missing (e.g. a first time build),
so don't try to look inside them for old nightlies if so.

CJ8664/servo,canaltinova/servo,splav/servo,emilio/servo,upsuper/servo,KiChjang/servo,anthgur/servo,nnethercote/servo,jimberlage/servo,larsbergstrom/servo,notriddle/servo,KiChjang/servo,ConnorGBrewster/servo,paulrouget/servo,DominoTree/servo,pyfisch/servo,peterjoel/servo,nnethercote/servo,CJ8664/servo,mattnenterprise/servo,saneyuki/servo,dati91/servo,CJ8664/servo,emilio/servo,anthgur/servo,peterjoel/servo,canaltinova/servo,canaltinova/servo,saneyuki/servo,szeged/servo,dsandeephegde/servo,peterjoel/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,notriddle/servo,pyfisch/servo,avadacatavra/servo,saneyuki/servo,DominoTree/servo,rnestler/servo,szeged/servo,avadacatavra/servo,larsbergstrom/servo,larsbergstrom/servo,notriddle/servo,rnestler/servo,peterjoel/servo,CJ8664/servo,szeged/servo,emilio/servo,anthgur/servo,SimonSapin/servo,splav/servo,avadacatavra/servo,peterjoel/servo,thiagopnts/servo,saneyuki/servo,mattnenterprise/servo,larsbergstrom/servo,nnethercote/servo,mbrubeck/servo,pyfisch/servo,mbrubeck/servo,canaltinova/servo,notriddle/servo,paulrouget/servo,jimberlage/servo,splav/servo,dati91/servo,jimberlage/servo,splav/servo,emilio/servo,rnestler/servo,KiChjang/servo,pyfisch/servo,fiji-flo/servo,saneyuki/servo,dsandeephegde/servo,fiji-flo/servo,splav/servo,mattnenterprise/servo,eddyb/servo,paulrouget/servo,pyfisch/servo,upsuper/servo,splav/servo,pyfisch/servo,mbrubeck/servo,larsbergstrom/servo,saneyuki/servo,szeged/servo,DominoTree/servo,dati91/servo,szeged/servo,upsuper/servo,sadmansk/servo,pyfisch/servo,emilio/servo,paulrouget/servo,cbrewster/servo,paulrouget/servo,dsandeephegde/servo,thiagopnts/servo,dati91/servo,thiagopnts/servo,mbrubeck/servo,jimberlage/servo,paulrouget/servo,sadmansk/servo,DominoTree/servo,notriddle/servo,larsbergstrom/servo,notriddle/servo,saneyuki/servo,rnestler/servo,mbrubeck/servo,splav/servo,peterjoel/servo,larsbergstrom/servo,eddyb/servo,CJ8664/servo,anthgur/servo,rnestler/servo,DominoTree/servo,eddyb/servo,mattnenterprise/servo,DominoTree/servo,larsbergstrom/servo,mattnenterprise/servo,cbrewster/servo,KiChjang/servo,canaltinova/servo,anthgur/servo,KiChjang/servo,paulrouget/servo,fiji-flo/servo,SimonSapin/servo,canaltinova/servo,avadacatavra/servo,dsandeephegde/servo,nnethercote/servo,emilio/servo,fiji-flo/servo,sadmansk/servo,szeged/servo,notriddle/servo,mattnenterprise/servo,DominoTree/servo,peterjoel/servo,SimonSapin/servo,saneyuki/servo,ConnorGBrewster/servo,DominoTree/servo,jimberlage/servo,larsbergstrom/servo,ConnorGBrewster/servo,CJ8664/servo,jimberlage/servo,paulrouget/servo,canaltinova/servo,peterjoel/servo,cbrewster/servo,fiji-flo/servo,eddyb/servo,dati91/servo,SimonSapin/servo,thiagopnts/servo,thiagopnts/servo,canaltinova/servo,avadacatavra/servo,avadacatavra/servo,sadmansk/servo,paulrouget/servo,KiChjang/servo,jimberlage/servo,fiji-flo/servo,larsbergstrom/servo,paulrouget/servo,cbrewster/servo,upsuper/servo,DominoTree/servo,mattnenterprise/servo,pyfisch/servo,KiChjang/servo,DominoTree/servo,cbrewster/servo,KiChjang/servo,sadmansk/servo,emilio/servo,saneyuki/servo,dati91/servo,nnethercote/servo,fiji-flo/servo,nnethercote/servo,sadmansk/servo,emilio/servo,sadmansk/servo,cbrewster/servo,nnethercote/servo,szeged/servo,notriddle/servo,nnethercote/servo,upsuper/servo,jimberlage/servo,rnestler/servo,avadacatavra/servo,eddyb/servo,SimonSapin/servo,ConnorGBrewster/servo,mbrubeck/servo,notriddle/servo,mbrubeck/servo,mattnenterprise/servo,ConnorGBrewster/servo,splav/servo,CJ8664/servo,dati91/servo,eddyb/servo,pyfisch/servo,dsandeephegde/servo,SimonSapin/servo,szeged/servo,peterjoel/servo,dsandeephegde/servo,rnestler/servo,peterjoel/servo,nnethercote/servo,dati91/servo,emilio/servo,pyfisch/servo,dsandeephegde/servo,SimonSapin/servo,KiChjang/servo,saneyuki/servo,emilio/servo,splav/servo,upsuper/servo,cbrewster/servo,upsuper/servo,mbrubeck/servo,dsandeephegde/servo,anthgur/servo,szeged/servo,rnestler/servo,jimberlage/servo,thiagopnts/servo,ConnorGBrewster/servo,eddyb/servo,nnethercote/servo,CJ8664/servo,SimonSapin/servo,KiChjang/servo,sadmansk/servo,anthgur/servo,splav/servo,thiagopnts/servo,upsuper/servo,notriddle/servo,anthgur/servo,thiagopnts/servo,fiji-flo/servo,eddyb/servo,cbrewster/servo,avadacatavra/servo,szeged/servo