centos: add runtime dependency for perftune script
centos: add runtime dependency for perftune script

Signed-off-by: Glauber Costa <7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>
Message-Id: <20170406172949.13264-1-7ba9037b0dd006f9408bd45b94707becd5cd4e87@scylladb.com>

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