Don't mutate cwd.
Don't mutate cwd.

Running composer dumpautoload should not mutate cwd.

Refs #5011

bravo-kernel/cakephp,eboominathan/cakephp,yinhe007/cakephp,tgr0ss/cakephp,pbaire/cakephp,elboletaire/cakephp,jeffblack360/cakephp,dakota/cakephp,akintoey/cakephp,ionas/cakephp,nrother/cakephp,erikfig/cakephp,cakephp-fr/cakephp,Balachan27/cakephp,eryw/cakephp,web-player/cakephp,jeffblack360/cakephp,CVO-Technologies/cakephp,michaelze/cakephp,gmponos/cakephp,timhoeppner/cakephp,web-player/cakephp,gmponos/cakephp,ADmad/cakephp,davidyell/cakephp,Balachan27/cakephp,HavokInspiration/cakephp,pbaire/cakephp,justinyost/cakephp,yinhe007/cakephp,cakephp/cakephp,ADmad/cakephp,petteyg/cakephp,dkarvounaris/cakephp,tgr0ss/cakephp,justinyost/cakephp,berrygoudswaard/cakephp,kumamidori/cakephp,burriko/cakephp,HavokInspiration/cakephp,tisu2tisu/cakephp,pbaire/cakephp,thinkingmedia/cakephp,thinkingmedia/cakephp,garethellis36/cakephp,garethellis36/cakephp,michaelze/cakephp,tisu2tisu/cakephp,berrygoudswaard/cakephp,CVO-Technologies/cakephp,ndm2/cakephp,gmponos/cakephp,garethellis36/cakephp,jerems02/cakephp,bravo-kernel/cakephp,bravo-kernel/cakephp,thinkingmedia/cakephp,web-player/cakephp,yinhe007/cakephp,berrygoudswaard/cakephp,petteyg/cakephp,jeffblack360/cakephp,tenkoma/cakephp,eboominathan/cakephp,khoimt/cakephp-study,Balachan27/cakephp,dakota/cakephp,mvdriel/cakephp,elboletaire/cakephp,tgr0ss/cakephp,dakota/cakephp,davidyell/cakephp,ionas/cakephp,kumamidori/cakephp,CakeDC/cakephp,dakota/cakephp,ndm2/cakephp,petteyg/cakephp,CakeDC/cakephp,ndm2/cakephp,garethellis36/cakephp,khoimt/cakephp-study,ionas/cakephp,adopico/cakephp,khoimt/cakephp-study,HavokInspiration/cakephp,tenkoma/cakephp,cakephp/cakephp,mvdriel/cakephp,burriko/cakephp,mvdriel/cakephp,dkarvounaris/cakephp,Phillaf/cakephp,eboominathan/cakephp,jerems02/cakephp,burriko/cakephp,adopico/cakephp,nrother/cakephp,tisu2tisu/cakephp,Phillaf/cakephp,ADmad/cakephp,jjj117/cakephp,jjj117/cakephp,tenkoma/cakephp,petteyg/cakephp,cakephp-fr/cakephp,erikfig/cakephp,justinyost/cakephp,Phillaf/cakephp,akintoey/cakephp,CakeDC/cakephp,cakephp/cakephp,eryw/cakephp,akintoey/cakephp,eryw/cakephp,erikfig/cakephp,tenkoma/cakephp,ndm2/cakephp,davidyell/cakephp,CakeDC/cakephp,michaelze/cakephp,mvdriel/cakephp,jjj117/cakephp,dkarvounaris/cakephp,cakephp/cakephp,kumamidori/cakephp,jerems02/cakephp,timhoeppner/cakephp,CVO-Technologies/cakephp,elboletaire/cakephp,adopico/cakephp,cakephp-fr/cakephp,nrother/cakephp,ADmad/cakephp,timhoeppner/cakephp