swap: scan /proc/swaps before processing waitid() results
    
    Similar to the previous commit, but for /proc/swaps, where the same
    logic and rationale applies.
    
    (cherry picked from commit bcce581d65de68cca01c73e1c890e261e72d20af)
    
    Related: #1696178
    
    patch_name: 0214-swap-scan-proc-swaps-before-processing-waitid-result.patch
    present_in_specfile: true
    location_in_specfile: 214
    squash_commits: true