qemu: caps: Don't try to ask for CAP_DAC_OVERRIDE if non-root
qemu: caps: Don't try to ask for CAP_DAC_OVERRIDE if non-root

It will not work. This breaks qemu capabilities probing as a user.

Signed-off-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Erik Skultety <2c14d38fa47c8799f1b9c16280abe27f8edfec6e@redhat.com>

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