virpcimock: Enable on macOS
virpcimock: Enable on macOS

In general, it has little sense to use Linux pci mock on macOS but
virPCIDeviceAddressGetIOMMUGroupNum() is relying on the filesystem
layout mocked by virpcimock. And all tests that rely on correct
execution of virPCIDeviceAddressGetIOMMUGroupNum() fail.

The change fixes qemuhotplugtest, qemumemlocktest and qemuxml2xmltest.

Signed-off-by: Roman Bolshakov <e9c94dff02085feaa10f4659102d5bd952cb2e61@yadro.com>
Reviewed-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,jfehlig/libvirt,libvirt/libvirt,olafhering/libvirt,crobinso/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,olafhering/libvirt,olafhering/libvirt,olafhering/libvirt,nertpinx/libvirt,zippy2/libvirt,libvirt/libvirt,jfehlig/libvirt,zippy2/libvirt,nertpinx/libvirt,crobinso/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt