Auto merge of #32112 - alexcrichton:fix-issues, r=aturon

std: Fix tracking issues and clean deprecated APIs

This PR fixes up a number of discrepancies found with tracking issues (some closed, some needed new ones, etc), and also cleans out all pre-1.8 deprecated APIs. The big beast here was dealing with `std::dynamic_lib`, and via many applications of a large hammer it's now out of the standard library.

Author: bors

lib.rs

@@ -20,7 +20,6 @@
 
 #![feature(box_patterns)]
 #![feature(box_syntax)]
-#![feature(dynamic_lib)]
 #![feature(libc)]
 #![feature(recover)]
 #![feature(rustc_private)]

plugins.rs

@@ -12,12 +12,13 @@
 
 use clean;
 
-use std::dynamic_lib as dl;
 use serialize::json;
 use std::mem;
 use std::string::String;
 use std::path::PathBuf;
 
+use rustc_back::dynamic_lib as dl;
+
 pub type PluginJson = Option<(String, json::Json)>;
 pub type PluginResult = (clean::Crate, PluginJson);
 pub type PluginCallback = fn (clean::Crate) -> PluginResult;

test.rs

@@ -8,11 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-#![allow(deprecated)]
-
 use std::cell::{RefCell, Cell};
 use std::collections::HashMap;
-use std::dynamic_lib::DynamicLibrary;
 use std::env;
 use std::ffi::OsString;
 use std::io::prelude::*;
@@ -32,6 +29,7 @@ use rustc::session::{self, config};
 use rustc::session::config::{get_unstable_features_setting, OutputType};
 use rustc::session::search_paths::{SearchPaths, PathKind};
 use rustc_front::lowering::{lower_crate, LoweringContext};
+use rustc_back::dynamic_lib::DynamicLibrary;
 use rustc_back::tempdir::TempDir;
 use rustc_driver::{driver, Compilation};
 use rustc_metadata::cstore::CStore;