Get rid of the bulk imports

Author: marmistrz

test/sys/test_ptrace.rs

@@ -1,13 +1,13 @@
 use nix::Error;
-use nix::errno::*;
-use nix::unistd::*;
+use nix::errno::Errno;
+use nix::unistd::getpid;
 use nix::sys::ptrace;
 
 use std::{mem, ptr};
 
 #[test]
 fn test_ptrace() {
-    use nix::sys::ptrace::ptrace::*;
+    use nix::sys::ptrace::ptrace::PTRACE_ATTACH;
     // Just make sure ptrace can be called at all, for now.
     // FIXME: qemu-user doesn't implement ptrace on all arches, so permit ENOSYS
     let err = ptrace::ptrace(PTRACE_ATTACH, getpid(), ptr::null_mut(), ptr::null_mut()).unwrap_err();
@@ -17,7 +17,7 @@ fn test_ptrace() {
 // Just make sure ptrace_setoptions can be called at all, for now.
 #[test]
 fn test_ptrace_setoptions() {
-    use nix::sys::ptrace::ptrace::*; // for PTRACE_O_TRACESYSGOOD
+    use nix::sys::ptrace::ptrace::PTRACE_O_TRACESYSGOOD;
     let err = ptrace::setoptions(getpid(), PTRACE_O_TRACESYSGOOD).unwrap_err();
     assert!(err != Error::UnsupportedOperation);
 }