qemu: Provide non-linux stub for qemuDomainAttachDeviceMknodRecursive
qemu: Provide non-linux stub for qemuDomainAttachDeviceMknodRecursive

The way we create devices under /dev is highly linux specific.
For instance we do mknod(), mount(), umount(), etc. Some
platforms are even missing some of these functions. Then again,
as declared in qemuDomainNamespaceAvailable(): namespaces are
linux only. Therefore, to avoid obfuscating the code by trying to
make it compile on weird platforms, just provide a non-linux stub
for qemuDomainAttachDeviceMknodRecursive(). At the same time,
qemuDomainAttachDeviceMknodHelper() which actually calls the
non-existent functions is moved under ifdef __linux__ block since
its only caller is in that block too.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>
Reviewed-by: Daniel P. Berrange <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>

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