Auto merge of #17161 - servo:jdm-patch-1, r=cbrewster
Auto merge of #17161 - servo:jdm-patch-1, r=cbrewster

Set the initial disk image size for mac packages.

Attempting to fix https://github.com/servo/servo/issues/16644 per https://apple.stackexchange.com/questions/156994/yosemite-hdiutil-create-failed-error-5341.

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