maint: allow bootstrap in a sandbox
maint: allow bootstrap in a sandbox

Jiri Denemark reported an instance of bootstrapping libvirt
failing when run inside a sandbox, traced to rpm trying to
access /var/ which was not permitted by the sandbox.

Alex Jia reported that 0.9.8-rc1 failed to bootstrap if patch(1)
is not installed.

* bootstrap.conf (buildreq): Avoid rpm call if python-config
exists.  Also, require patch, in case we have gnulib-local diffs.

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