Move test_aio_drop from Cargo.toml to test mod.rs

This makes it easier to add conditional compilation flags, the same
way it's done for test_aio.

Cargo.toml

@@ -37,10 +37,6 @@ sysctl = "0.1"
 name = "test"
 path = "test/test.rs"
 
-[[test]]
-name = "test-aio-drop"
-path = "test/sys/test_aio_drop.rs"
-
 [[test]]
 name = "test-lio-listio-resubmit"
 path = "test/sys/test_lio_listio_resubmit.rs"

test/sys/mod.rs

@@ -11,6 +11,12 @@ mod test_signal;
           target_os = "macos",
           target_os = "netbsd"))]
 mod test_aio;
+#[cfg(any(target_os = "freebsd",
+          target_os = "ios",
+          target_os = "linux",
+          target_os = "macos",
+          target_os = "netbsd"))]
+mod test_aio_drop;
 #[cfg(target_os = "linux")]
 mod test_signalfd;
 mod test_socket;

test/sys/test_aio_drop.rs

@@ -1,7 +1,6 @@
 extern crate nix;
 extern crate tempfile;
 
-#[cfg(not(target_os = "openbsd"))]
 use nix::sys::aio::*;
 use nix::sys::signal::*;
 use std::os::unix::io::AsRawFd;
@@ -12,8 +11,7 @@ use tempfile::tempfile;
 // the AIO subsystem and causes subsequent tests to fail
 #[test]
 #[should_panic(expected = "Dropped an in-progress AioCb")]
-#[cfg(not(any(target_env = "musl",
-              target_os = "openbsd")))]
+#[cfg(not(target_env = "musl"))]
 fn test_drop() {
     const WBUF: &[u8] = b"CDEF";