sync: latest libbpf changes from kernel

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   6b207d66aa9fad0deed13d5f824e1ea193b0a777
Checkpoint bpf-next commit: 2977282b63c3b6f112145ecf0bcefff0c65bd3ac
Baseline bpf commit:        e708e2bd55c921f5bb554fa5837d132a878951cf
Checkpoint bpf commit:      0f57a1e522f413e87852e632f55de4723e511939

Andrii Nakryiko (4):
  libbpf: Make BTF finalization strict
  libbpf: Add btf__set_fd() for more control over loaded BTF FD
  libbpf: Improve BTF sanitization handling
  libbpf: Handle missing BPF_OBJ_GET_INFO_BY_FD gracefully in
    perf_buffer

Stanislav Fomichev (1):
  libbpf: Add support for BPF_CGROUP_INET_SOCK_RELEASE

 include/uapi/linux/bpf.h |   1 +
 src/btf.c                |   7 +-
 src/btf.h                |   1 +
 src/libbpf.c             | 154 ++++++++++++++++++++++-----------------
 src/libbpf.map           |   1 +
 5 files changed, 95 insertions(+), 69 deletions(-)

--
2.24.1

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-e708e2bd55c921f5bb554fa5837d132a878951cf
+0f57a1e522f413e87852e632f55de4723e511939

CHECKPOINT-COMMIT

@@ -1 +1 @@
-6b207d66aa9fad0deed13d5f824e1ea193b0a777
+2977282b63c3b6f112145ecf0bcefff0c65bd3ac