only import the needed types in netdb and poll

src/header/netdb/mod.rs

@@ -31,7 +31,7 @@ use crate::{
     platform::{
         self, Pal, Sys,
         rlb::{Line, RawLineBuffer},
-        types::*,
+        types::{c_char, c_int, c_ulong, c_void},
     },
     raw_cell::RawCell,
 };

src/header/poll/mod.rs

@@ -19,7 +19,7 @@ use crate::{
         },
         time::timespec,
     },
-    platform::types::*,
+    platform::types::{c_int, c_short, c_ulong},
 };
 
 pub const POLLIN: c_short = 0x001;