Merge pull request #3646 from bzEq/aix-link-libs

Fix configuration for AIX

Author: JohnTitor

src/unix/mod.rs

@@ -395,7 +395,7 @@ cfg_if! {
         #[cfg_attr(feature = "rustc-dep-of-std",
                    link(name = "c", cfg(not(target_feature = "crt-static"))))]
         extern {}
-    } else if #[cfg(target_env = "aix")] {
+    } else if #[cfg(target_os = "aix")] {
         #[link(name = "c")]
         #[link(name = "m")]
         #[link(name = "bsd")]