sync: latest libbpf changes from kernel

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8
Checkpoint bpf-next commit: 06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd
Baseline bpf commit:        929e54a989680c6f134b02293732030b897475dc
Checkpoint bpf commit:      3fb1a96a91120877488071a167d26d76be4be977

Andrii Nakryiko (4):
  libbpf: Fix BTF-defined map-in-map initialization on 32-bit host
    arches
  libbpf: Handle BTF pointer sizes more carefully
  libbpf: Enforce 64-bitness of BTF for BPF object files
  libbpf: Fix build on ppc64le architecture

Jean-Philippe Brucker (1):
  libbpf: Handle GCC built-in types for Arm NEON

Toke Høiland-Jørgensen (1):
  libbpf: Prevent overriding errno when logging errors

Yonghong Song (1):
  libbpf: Do not use __builtin_offsetof for offsetof

 src/bpf_helpers.h |  2 +-
 src/btf.c         | 83 +++++++++++++++++++++++++++++++++++++++++++++--
 src/btf.h         |  2 ++
 src/btf_dump.c    | 39 ++++++++++++++++++++--
 src/libbpf.c      | 32 +++++++++++-------
 src/libbpf.map    |  2 ++
 6 files changed, 143 insertions(+), 17 deletions(-)

--
2.24.1

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-929e54a989680c6f134b02293732030b897475dc
+3fb1a96a91120877488071a167d26d76be4be977

CHECKPOINT-COMMIT

@@ -1 +1 @@
-bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8
+06a4ec1d9dc652e17ee3ac2ceb6c7cf6c2b75cdd