b27f0f6 Run hardlink on promoted compose

Authored and Committed by hlin 3 years ago
    Run hardlink on promoted compose
    
    This should help with images that are generated in work/ and
    hardlinked to compose/ during compose process.
    
    hardlink >= 1.3 is required for the -x option.
    
    JIRA: RHELCMP-2880
    Signed-off-by: Haibo Lin <hlin@redhat.com>