sync: Update libbpf submodule

Pull latest libbpf from mirror.
Libbpf version: 1.1.0
Libbpf commit:  9167308b4a7f7de7ffb1b40f2880f4d45844551e

Signed-off-by: Quentin Monnet <quentin@isovalent.com>
diff --git a/libbpf b/libbpf
index 68e6f83..9167308 160000
--- a/libbpf
+++ b/libbpf
@@ -1 +1 @@
-Subproject commit 68e6f83f223ebf3fbf0d94c0f4592e5e6773f0c1
+Subproject commit 9167308b4a7f7de7ffb1b40f2880f4d45844551e