`ctf` plugins: port: cast to intmax_t all off_t variables when printing

`ctf` plugins: port: cast to intmax_t all off_t variables when printing

This patch fixes new sites since the following commit:

  commit 1974687e6b7a08d8383a4a5c75265d0ed3b8c5c9
  Author: Michael Jeanson <mjeanson@efficios.com>
  Date:   Mon Jul 10 12:39:38 2017 -0400

      Port: handle 'size_t' / 'off_t' on Solaris

      The size of 'size_t' / 'off_t' vary on some platforms, use C99 portable
      macros and print formats to handle them.

      Print 'size_t' with '%zu' and use SIZE_MAX as max value.
      Print 'off_t' casted to 'intmax_t' with '%jd'.

      Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
      Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I8c0677f5ff590c25df6257c2d3f5142de93d01b0
Signed-off-by: Jonathan Rajotte <jonathan.rajotte-julien@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/1803
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Philippe Proulx <eeppeliteloop@gmail.com>