leaking_addresses: also skip canonical ftrace path

The canonical location for the tracefs filesystem is at /sys/kernel/tracing.

But, from Documentation/trace/ftrace.rst:

  Before 4.1, all ftrace tracing control files were within the debugfs
  file system, which is typically located at /sys/kernel/debug/tracing.
  For backward compatibility, when mounting the debugfs file system,
  the tracefs file system will be automatically mounted at:

  /sys/kernel/debug/tracing

scripts/leaking_addresses.pl only skipped this older debugfs path, so
let's add the canonical path as well.

Link: https://lkml.kernel.org/r/20230313211746.1541525-2-zwisler@kernel.org

Cc: "Tobin C. Harding" <me@tobin.cc>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Acked-by: Tycho Andersen <tycho@tycho.pizza>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

scripts/leaking_addresses.pl

@@ -61,6 +61,7 @@ my @skip_abs = (
 	'/proc/device-tree',
 	'/proc/1/syscall',
 	'/sys/firmware/devicetree',
+	'/sys/kernel/tracing/trace_pipe',
 	'/sys/kernel/debug/tracing/trace_pipe',
 	'/sys/kernel/security/apparmor/revision');