qemuBuildChrChardevStr: Introduce @nowait argument
qemuBuildChrChardevStr: Introduce @nowait argument

This alone makes not much sense. But the aim is to reuse this
function in qemuBuildVhostuserCommandLine() where 'nowait' is not
supported for vhost-user devices.

Signed-off-by: Michal Privoznik <83d82aaba2eed257f4814b0c239c260c4caaadf0@redhat.com>

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