perf annotate: Add missing arguments in Man page

Some options must require an argument. But input, stdio-color, cpu have
no them.  So I added it.

Signed-off-by: Jaecheol Shin <jcgod413@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Link: http://lkml.kernel.org/r/20180207095205.62715-1-jcgod413@gmail.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>