rpm: simplify applying of patches
rpm: simplify applying of patches

The distros we support for RPM builds all have %autosetup support so we
can ditch the convoluted code for running git manually and use the RPM
defaults.

Reviewed-by: Martin Kletzander <e82f23e74d43760279ebcc505dac4ae70d5627d0@redhat.com>
Signed-off-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

jfehlig/libvirt,nertpinx/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,libvirt/libvirt,andreabolognani/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,olafhering/libvirt,libvirt/libvirt,eskultety/libvirt,crobinso/libvirt,jardasgit/libvirt,andreabolognani/libvirt,libvirt/libvirt,crobinso/libvirt,nertpinx/libvirt,eskultety/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt,eskultety/libvirt,olafhering/libvirt,crobinso/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,zippy2/libvirt,olafhering/libvirt,jardasgit/libvirt,eskultety/libvirt,zippy2/libvirt,nertpinx/libvirt,jfehlig/libvirt,nertpinx/libvirt,crobinso/libvirt,nertpinx/libvirt,zippy2/libvirt,andreabolognani/libvirt,libvirt/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jardasgit/libvirt