Documentation/vm/slub.txt: document slabinfo-gnuplot.sh
Documentation/vm/slub.txt: document slabinfo-gnuplot.sh

Add documentation on how to use slabinfo-gnuplot.sh script.

Signed-off-by: Sergey Senozhatsky <d9c384f6b6e27869ff3b53bd225c29030ac4166b@gmail.com>
Acked-by: Christoph Lameter <ef3ecccf258fa062c5c6521a4887d40541963af7@linux.com>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs