e32920a utils: make N_ELEMENTS public

2 files Authored by sbose 5 years ago, Committed by jhrozek 5 years ago,
    utils: make N_ELEMENTS public
    
    The calculation of the size of an array is used in the main code as
    well, so it makes sense to move N_ELEMENTS to a common header to use it
    more often.
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
    
        
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