Doc: Indentation fix for Gluster man page

Corrected the indentation for the Log Commands section

Change-Id: I9c706bc727d67e4ae3bde4d2556b3ffcd920ceeb
BUG: 1097051
Signed-off-by: Nithya Balachandran <nbalacha@redhat.com>
Reviewed-on: http://review.gluster.org/7746
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Reviewed-by: Humble Devassy Chirammal <humble.devassy@gmail.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>