Fix make uninstall
Fix make uninstall

Make uninstall currently fails with the following message:

rmdir /etc/sasl2/
rmdir: failed to remove `/etc/sasl2/': Directory not empty

That's fine (correct in fact) so force the command to return success
with || :

zippy2/libvirt,elmarco/libvirt,zhlcindy/libvirt-1.1.4-maintain,olafhering/libvirt,bjzhang/libvirt,crobinso/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,datto/libvirt,jfehlig/libvirt,jardasgit/libvirt,zippy2/libvirt,rlaager/libvirt,emaste/libvirt,jeckersb/libvirt,jfehlig/libvirt,rmarwaha/libvirt1,foomango/libvirt,shugaoye/libvirt,shugaoye/libvirt,trainstack/libvirt,emaste/libvirt,datto/libvirt,VenkatDatta/libvirt,fabianfreyer/libvirt,siboulet/libvirt-openvz,novel/fbsd-libvirt,jeckersb/libvirt,jfehlig/libvirt,emaste/libvirt,danwent/libvirt-ovs,jardasgit/libvirt,rmarwaha/libvirt1,foomango/libvirt,taget/libvirt,siboulet/libvirt-openvz,eskultety/libvirt,libvirt/libvirt,rlaager/libvirt,emaste/libvirt,datto/libvirt,rmarwaha/libvirt1,novel/fbsd-libvirt,zippy2/libvirt,emaste/libvirt,emaste/libvirt,elmarco/libvirt,shugaoye/libvirt,warewolf/libvirt,agx/libvirt,danwent/libvirt-ovs,rmarwaha/libvirt1,bjzhang/libvirt,bjzhang/libvirt,cbosdo/libvirt,warewolf/libvirt,taget/libvirt,eskultety/libvirt,VenkatDatta/libvirt,jeckersb/libvirt,shugaoye/libvirt,agx/libvirt,zhlcindy/libvirt-1.1.4-maintain,datto/libvirt,rmarwaha/libvirt,andreabolognani/libvirt,jeckersb/libvirt,rlaager/libvirt,crobinso/libvirt,dumbbell/libvirt,rmarwaha/libvirt,elmarco/libvirt,trainstack/libvirt,jardasgit/libvirt,novel/fbsd-libvirt,olafhering/libvirt,trainstack/libvirt,agx/libvirt,siboulet/libvirt-openvz,jardasgit/libvirt,cbosdo/libvirt,eskultety/libvirt,iam-TJ/libvirt,wiedi/libvirt,zippy2/libvirt,cbosdo/libvirt,nertpinx/libvirt,crobinso/libvirt,rmarwaha/libvirt1,elmarco/libvirt,olafhering/libvirt,jeckersb/libvirt,nertpinx/libvirt,novel/fbsd-libvirt,warewolf/libvirt,iam-TJ/libvirt,danwent/libvirt-ovs,nertpinx/libvirt,foomango/libvirt,jeckersb/libvirt,VenkatDatta/libvirt,iam-TJ/libvirt,emaste/libvirt,zhlcindy/libvirt-1.1.4-maintain,rmarwaha/libvirt,rlaager/libvirt,iam-TJ/libvirt,taget/libvirt,fabianfreyer/libvirt,cbosdo/libvirt,trainstack/libvirt,bjzhang/libvirt,dumbbell/libvirt,andreabolognani/libvirt,siboulet/libvirt-openvz,wiedi/libvirt,cbosdo/libvirt,dumbbell/libvirt,shugaoye/libvirt,VenkatDatta/libvirt,trainstack/libvirt,eskultety/libvirt,eskultety/libvirt,dumbbell/libvirt,datto/libvirt,fabianfreyer/libvirt,novel/fbsd-libvirt,wiedi/libvirt,dumbbell/libvirt,novel/fbsd-libvirt,crobinso/libvirt,VenkatDatta/libvirt,rmarwaha/libvirt,wiedi/libvirt,rlaager/libvirt,nertpinx/libvirt,iam-TJ/libvirt,foomango/libvirt,libvirt/libvirt,danwent/libvirt-ovs,bjzhang/libvirt,libvirt/libvirt,warewolf/libvirt,wiedi/libvirt,nertpinx/libvirt,taget/libvirt,zhlcindy/libvirt-1.1.4-maintain,libvirt/libvirt,zhlcindy/libvirt-1.1.4-maintain,danwent/libvirt-ovs,iam-TJ/libvirt,agx/libvirt,dumbbell/libvirt,elmarco/libvirt,novel/fbsd-libvirt,andreabolognani/libvirt,wiedi/libvirt,rmarwaha/libvirt,trainstack/libvirt,siboulet/libvirt-openvz,andreabolognani/libvirt,jeckersb/libvirt,jfehlig/libvirt,andreabolognani/libvirt,taget/libvirt,wiedi/libvirt,warewolf/libvirt,trainstack/libvirt,warewolf/libvirt,rmarwaha/libvirt1,novel/fbsd-libvirt,fabianfreyer/libvirt,iam-TJ/libvirt,olafhering/libvirt,foomango/libvirt,rmarwaha/libvirt,agx/libvirt,jardasgit/libvirt,warewolf/libvirt