sync: latest libbpf changes from kernel

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   706819495921ddad6b3780140b9d9e9293b6dedc
Checkpoint bpf-next commit: b148c8b9b926e257a59c8eb2cd6fa3adfd443254
Baseline bpf commit:        e931a173a685fe213127ae5aa6b7f2196c1d875d
Checkpoint bpf commit:      4121d4481b72501aa4d22680be4ea1096d69d133

Andrii Nakryiko (4):
  libbpf: Fix single-line struct definition output in btf_dump
  libbpf: Handle non-standardly sized enums better in BTF-to-C dumper
  libbpf: Fix btf__align_of() by taking into account field offsets
  libbpf: Fix BTF-to-C converter's padding logic

Eyal Birger (1):
  tools: add IFLA_XFRM_COLLECT_METADATA to uapi/linux/if_link.h

Kumar Kartikeya Dwivedi (1):
  bpf: Rework process_dynptr_func

Timo Hunziker (1):
  libbpf: Parse usdt args without offset on x86 (e.g. 8@(%rsp))

Xin Liu (1):
  libbpf: Optimized return value in libbpf_strerror when errno is libbpf
    errno

 include/uapi/linux/bpf.h     |   8 +-
 include/uapi/linux/if_link.h |   1 +
 src/btf.c                    |  13 +++
 src/btf_dump.c               | 214 +++++++++++++++++++++++++++--------
 src/libbpf_errno.c           |  16 ++-
 src/usdt.c                   |   8 ++
 6 files changed, 204 insertions(+), 56 deletions(-)

--
2.30.2

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-e931a173a685fe213127ae5aa6b7f2196c1d875d
+4121d4481b72501aa4d22680be4ea1096d69d133

CHECKPOINT-COMMIT

@@ -1 +1 @@
-706819495921ddad6b3780140b9d9e9293b6dedc
+b148c8b9b926e257a59c8eb2cd6fa3adfd443254