dump: use stderr instead of stdout when getting SIGCONT (#2438)
dump: use stderr instead of stdout when getting SIGCONT (#2438)

Signed-off-by: Jonathan Gonzalez V <94ea12a07b8d4affd9b13084d7dd7bd0017fb274@2ndquadrant.com>

Co-authored-by: Jonathan Gonzalez V <94ea12a07b8d4affd9b13084d7dd7bd0017fb274@2ndquadrant.com>
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