update libbpf-sys 1.5.1 with ring__ functions

Summary: Backports libbpf/libbpf-sys#127 to v1.5.1 (upstream is v1.5.2)

Reviewed By: dtolnay

Differential Revision: D79299028

fbshipit-source-id: 6a3b7dcc45eb3d838c0d51459fb0fa03aefa600f

Author: calebho

eden/fs/Cargo.toml

@@ -9,6 +9,7 @@ displaydoc = { git = "https://github.com/yaahc/displaydoc", rev = "7dc6e324b1788
 imgui = { git = "https://github.com/imgui-rs/imgui-rs.git", rev = "2abba18c08fb5e70c699ba7992342e7ff8573b09" }
 imgui-sys = { git = "https://github.com/imgui-rs/imgui-rs.git", rev = "2abba18c08fb5e70c699ba7992342e7ff8573b09" }
 k = { git = "https://github.com/prnthp-meta/k", rev = "f06b504c563a4763dbf2d47366b868f67d5c9dd2" }
+libbpf-sys = { git = "https://github.com/calebho/libbpf-sys.git", rev = "ac56b9d69f477711b8f02bab12319999e8ba410b" }
 lru-disk-cache = { git = "https://github.com/mozilla/sccache", rev = "fdbf843d174c6796d736b2b61dab0297670390f8" }
 murmur3 = { git = "https://github.com/stusmall/murmur3", rev = "f363bf6dd1d668988bf798c320823f8ceaedf5aa" }
 pcap = { git = "https://github.com/qrnch-jan/pcap", rev = "0c6ed076c84ef0c63198d384a24d66b737b24e4a" }

eden/mononoke/Cargo.toml

@@ -84,6 +84,7 @@ displaydoc = { git = "https://github.com/yaahc/displaydoc", rev = "7dc6e324b1788
 imgui = { git = "https://github.com/imgui-rs/imgui-rs.git", rev = "2abba18c08fb5e70c699ba7992342e7ff8573b09" }
 imgui-sys = { git = "https://github.com/imgui-rs/imgui-rs.git", rev = "2abba18c08fb5e70c699ba7992342e7ff8573b09" }
 k = { git = "https://github.com/prnthp-meta/k", rev = "f06b504c563a4763dbf2d47366b868f67d5c9dd2" }
+libbpf-sys = { git = "https://github.com/calebho/libbpf-sys.git", rev = "ac56b9d69f477711b8f02bab12319999e8ba410b" }
 lru-disk-cache = { git = "https://github.com/mozilla/sccache", rev = "fdbf843d174c6796d736b2b61dab0297670390f8" }
 murmur3 = { git = "https://github.com/stusmall/murmur3", rev = "f363bf6dd1d668988bf798c320823f8ceaedf5aa" }
 pcap = { git = "https://github.com/qrnch-jan/pcap", rev = "0c6ed076c84ef0c63198d384a24d66b737b24e4a" }