sync: latest libbpf changes from kernel

Syncing latest libbpf commits from kernel repository.
Baseline bpf-next commit:   0e545dbaa2797133f57bf8387e8f74cd245cedea
Checkpoint bpf-next commit: 5319255b8df9271474bc9027cabf82253934f28d
Baseline bpf commit:        d0c6416bd7091647f6041599f396bfa19ae30368
Checkpoint bpf commit:      8d6c414cd2fb74aa6812e9bfec6178f8246c4f3a

Hou Tao (1):
  libbpf: Support detecting and attaching of writable tracepoint program

 src/libbpf.c | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

--
2.30.2

BPF-CHECKPOINT-COMMIT

@@ -1 +1 @@
-d0c6416bd7091647f6041599f396bfa19ae30368
+8d6c414cd2fb74aa6812e9bfec6178f8246c4f3a

CHECKPOINT-COMMIT

@@ -1 +1 @@
-0e545dbaa2797133f57bf8387e8f74cd245cedea
+5319255b8df9271474bc9027cabf82253934f28d