The documentation for perf script mixes up '-f' and '-F'. Fix it.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/NoneSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>