virpcimock: Fix memory leak in pci_driver_new
virpcimock: Fix memory leak in pci_driver_new

driverpath, allocated by virAsprintfQuiet, was not freed and leaked.

Signed-off-by: Zhipeng Lu <72f563487761f98879841772891280e34fc6fc4d@zte.com.cn>

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