Add alpine to libbpf availability

Author: patricoferris

packages/libbpf/libbpf.0.1.0/opam

@@ -40,7 +40,8 @@ available: [ os = "linux" &
 	   (( os-distribution = "debian" & os-version >= "12" )     # Linux 6.1 & Libbpf 1.1.0
  	   |( os-distribution = "ubuntu" & os-version >= "23.04" )  # Linux 6.2 & Libbpf 1.1.0
 	   |( os-family = "fedora" & os-version >= "38" )           # Linux 6.2 & Libbpf 1.1.0
-     |( os-distribution = "nixos"  & os-version >= "23.05" )) # Linux 6.1 & Libbpf 1.1.0
+           |( os-distribution = "nixos"  & os-version >= "23.05" )  # Linux 6.1 & Libbpf 1.1.0
+           |( os-distribution = "alpine" & os-version >= "3.18"))   # Linux 6.1 & Libbpf 1.2.2
 	   ]
 url {
   src: