stylo: Align eRestyle_Subtree value with RESTYLE_DESCENDANTS.
stylo: Align eRestyle_Subtree value with RESTYLE_DESCENDANTS.

Handle the translation of eRestyle_Subtree into
(RESTYLE_SELF | RESTYLE_DESCENDANTS) in the From impl, too.

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