perf inject: Document missing options

Add the missing --force option to the man page.

Signed-off-by: Sihyeon Jang <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/perf/Documentation/perf-inject.txt

···
 	found in the jitdumps files captured in the input perf.data file. Use this option
 	if you are monitoring environment using JIT runtimes, such as Java, DART or V8.
 
+-f::
+--force::
+	Don't complain, do it.
+
 SEE ALSO
 --------
 linkperf:perf-record[1], linkperf:perf-report[1], linkperf:perf-archive[1]