lttng-modules: update 2.13.7 -> 2.13.8

2023-01-13 (National Sticker Day) LTTng modules 2.13.8
	* fix: jbd2: use the correct print format
	* Fix: in_x32_syscall was introduced in v4.7.0
	* Explicitly skip tracing x32 system calls
	* fix: kallsyms wrapper on ppc64el
	* fix: Adjust ranges for RHEL 8.6 kernels
	* fix: kvm-x86 requires CONFIG_KALLSYMS_ALL
	* fix: mm/slab_common: drop kmem_alloc & avoid dereferencing fields when not using (v6.1)

Drop backported 0001-fix-mm-slab_common-drop-kmem_alloc-avoid-dereferenci.patch
0009-Rename-genhd-wrapper-to-blkdev.patch is present only on the master branch
and not on 2.13 branch, so keep it in the recipe.

Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 5b04d4ce)
Signed-off-by: Steve Sakoman <steve@sakoman.com>