add backup files to .gitignore
add backup files to .gitignore

mmnelemane/crowbar,MaximilianMeister/crowbar,rsalevsky/crowbar,aplanas/crowbar,tserong/crowbar,rhafer/crowbar,rhafer/crowbar,rsalevsky/crowbar,crowbar/crowbar,nkrinner/crowbar,tserong/crowbar,toabctl/crowbar,SUSE-Cloud/crowbar,aspiers/crowbar,aplanas/crowbar,aspiers/crowbar,dirkmueller/crowbar,SUSE-Cloud/crowbar,MaximilianMeister/crowbar,rhafer/crowbar,toabctl/crowbar,vwallfahrer/crowbar,mmnelemane/crowbar,nkrinner/crowbar,dirkmueller/crowbar,vwallfahrer/crowbar,crowbar/crowbar