spec: add hostname.rpm into Recommends list
    
    Resolves: bz2017196
    Upstream: Fedora
    Conflict: None
    
    commit c480be7ccf8d63bed81f167bb4da7645f68c52a7
    Author: Pingfan Liu <piliu@redhat.com>
    Date:   Wed Jan 12 19:24:26 2022 +0800
    
        spec: add hostname.rpm into Recommends list
    
        kexec-tools runs hostname binary in the case of fence_kdump. Since this
        is a trival dependency and should not block the kexec-tools installation
        if non-existent, using weak-dependency to resolve it.
    
        Signed-off-by: Pingfan Liu <piliu@redhat.com>
        Acked-by: Tao Liu <ltao@redhat.com>
    
    Signed-off-by: Pingfan Liu <piliu@redhat.com>