Recognize 32-bit NetBSD

src/unix/bsd/netbsdlike/netbsd/other/b32/mod.rs

+pub type c_long = i32;
+pub type c_ulong = u32;

src/unix/bsd/netbsdlike/netbsd/other/mod.rs

@@ -2,6 +2,11 @@ cfg_if! {
     if #[cfg(target_arch = "x86_64")] {
         mod b64;
         pub use self::b64::*;
+    } else if #[cfg(any(target_arch = "arm",
+                        target_arch = "powerpc",
+                        target_arch = "x86"))] {
+        mod b32;
+        pub use self::b32::*;
     } else {
         // Unknown target_arch
     }