hydra-module/compressLogs: Avoid creating /root/r.

We really don't need to touch a file in the current working directory to find files that are older than one month. Since findutils 4.3.3 there is a -newerXY option which allows to specify timestamps directly (as with date --date).

But even when using a reference file, it really causes confusion if people look into /root and try to debug where that misterious "r" file is coming from.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

Created by  aszlig  on November 4, 2013
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