libtracefs: Add man pages for tracefs_event_file_*() functions

Add the following functions to the man pages:
   tracefs_event_get_file()
   tracefs_event_file_read()
   tracefs_event_file_write()
   tracefs_event_file_append()
   tracefs_event_file_clear()
   tracefs_event_file_exists()

Link: https://lore.kernel.org/linux-trace-devel/20220223003012.1334741-10-rostedt@goodmis.org

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2 files changed