trace-cmd: Add missing APIs to libtracecmd main man page

These APIs were not listed in the main man page of tracecmd library:
  tracecmd_open()
  tracecmd_open_fd()

Link: https://lore.kernel.org/linux-trace-devel/20210205075752.1283926-1-tz.stoyanov@gmail.com

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed