cfg.mk: change syntax-check rule for VIR_AUTOCLOSE variable initialization
cfg.mk: change syntax-check rule for VIR_AUTOCLOSE variable initialization

Signed-off-by: Shi Lei <79e2d1a953a210f9f0c36cafbe946414d6421d20@massclouds.com>

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