fadump: preserve file modification time to help with hardlinking
    
    Resolves: bz2139000
    Upstream: Fedora
    Conflict: None
    
    commit f33c99e34749e976b610ad939f507cc471b33980
    Author: Hari Bathini <hbathini@linux.ibm.com>
    Date:   Mon Oct 31 15:42:21 2022 +0530
    
        fadump: preserve file modification time to help with hardlinking
    
        With commit fa9201b2 ("fadump: isolate fadump initramfs image within
        the default one"), initramfs image gets to hold two images, one for
        production kernel boot purpose and the other for capture kernel boot.
        Most files are common among the two images. Retain file modification
        time to replace duplicate files with hardlinks and save space. Also,
        avoid unnecessarily compressing fadump image that is decompressed
        immediately anyway.
    
        Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
        Reviewed-by: Philipp Rudo <prudo@redhat.com>
    
    Signed-off-by: Lichen Liu <lichliu@redhat.com>