Add SO_PEERCRED

src/unix/unikraft/mod.rs

@@ -964,6 +964,8 @@ pub const SO_TYPE: ::c_int = 0x1008;
 pub const SO_CONTIMEO: ::c_int = 0x1009;
 pub const SO_NO_CHECK: ::c_int = 0x100a;
 
+pub const SO_PEERCRED: ::c_int = 17;
+
 pub const SOCK_STREAM: ::c_int = 1;
 pub const SOCK_DGRAM: ::c_int = 2;
 pub const SOCK_RAW: ::c_int = 3;