Merge pull request #1222 from hermit-os/eai

fix(syscalls): use `EAI_*` constants from FreeBSD

src/syscalls/socket.rs

@@ -45,11 +45,17 @@ pub const SO_RCVTIMEO: i32 = 0x1006;
 pub const SO_ERROR: i32 = 0x1007;
 pub const TCP_NODELAY: i32 = 1;
 pub const MSG_PEEK: i32 = 1;
-pub const EAI_NONAME: i32 = -2200;
-pub const EAI_SERVICE: i32 = -2201;
-pub const EAI_FAIL: i32 = -2202;
-pub const EAI_MEMORY: i32 = -2203;
-pub const EAI_FAMILY: i32 = -2204;
+pub const EAI_AGAIN: i32 = 2;
+pub const EAI_BADFLAGS: i32 = 3;
+pub const EAI_FAIL: i32 = 4;
+pub const EAI_FAMILY: i32 = 5;
+pub const EAI_MEMORY: i32 = 6;
+pub const EAI_NODATA: i32 = 7;
+pub const EAI_NONAME: i32 = 8;
+pub const EAI_SERVICE: i32 = 9;
+pub const EAI_SOCKTYPE: i32 = 10;
+pub const EAI_SYSTEM: i32 = 11;
+pub const EAI_OVERFLOW: i32 = 14;
 pub type sa_family_t = u8;
 pub type socklen_t = u32;
 pub type in_addr_t = u32;