move variable FENCE_KDUMP_SEND from kdump-lib.sh to kdump-lib-initramfs.sh
    
    Resolves: bz2031736
    Upstream: Fedora
    Conflict: None
    
    commit 3cd561fcbcb3ba4f285e746d81e1e6dae17447c3 (HEAD)
    Author: Pingfan Liu <piliu@redhat.com>
    Date:   Tue Jan 18 10:42:00 2022 +0800
    
        move variable FENCE_KDUMP_SEND from kdump-lib.sh to kdump-lib-initramfs.sh
    
        Since kdump-lib-initramfs.sh is included by kdump-lib.sh, and
        FENCE_KDUMP_SEND is used by both 1st and 2nd kernel, moving
        FENCE_KDUMP_SEND from kdump-lib.sh to kdump-lib-initramfs.sh.
    
        Signed-off-by: Pingfan Liu <piliu@redhat.com>
        Acked-by: Tao Liu <ltao@redhat.com>
    
    Signed-off-by: Pingfan Liu <piliu@redhat.com>