lib: add _msg parameters to _ERRNO logging macros

lib: add _msg parameters to _ERRNO logging macros

The macros BT_COMP_LOGE_APPEND_CAUSE_ERRNO and
BT_COMP_CLASS_LOGE_APPEND_CAUSE_ERRNO are missing the `_msg` parameter
that other _ERRNO macros have.  It still works, because the following
parameters are passed through the variable arguments, but it makes the
macro unnecessarily complicated to use.

Change-Id: Iabb89a24da1641c67b9843c8337aec709c7b3e08
Signed-off-by: Simon Marchi <simon.marchi@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2229
Tested-by: jenkins <jenkins@lttng.org>
Reviewed-by: Francis Deslauriers <francis.deslauriers@efficios.com>