test-cpu-set-util: fix comparison for allocation size
    
    On i386, __cpu_mask is 4 bytes, so we'd check if c.allocated >= 0, and
    gcc would warn about a bogus comparison. Let's round up.
    
    Fixes #12726.
    
    (cherry picked from commit a299ce058b41b21c87f36e77e2c563b0ddd1be0d)
    
    Related: #1734787
    
    patch_name: 0294-test-cpu-set-util-fix-comparison-for-allocation-size.patch
    present_in_specfile: true
    location_in_specfile: 294
    squash_commits: true