Auto merge of #56911 - rust-lang:stable-1.31.1, r=Mark-Simulacrum

[stable] 1.31.1 point release

Rust 1.31.1 is scheduled to be released on Thursday 20th, with the following changes:

* #56562: Update libc version required by rustc *(different patch made by me)*
* #56615: Update the book to fix some edition-related bugs
* rls submodule update to [`b379ef7`](rust-lang/rls@b379ef7), including:
  * rust-lang/rls#1170: Fix for common infinte loop regression
  * rust-lang/rls#1171: Can't jump to std defs

r? @Mark-Simulacrum
cc @rust-lang/core @rust-lang/release

Author: bors

RELEASES.md

@@ -1,3 +1,14 @@
+Version 1.31.1 (2018-12-20)
+===========================
+
+- [Fix Rust failing to build on `powerpc-unknown-netbsd`][56562]
+- [Fix broken go-to-definition in RLS][rls/1171]
+- [Fix infinite loop on hover in RLS][rls/1170]
+
+[56562]: https://github.com/rust-lang/rust/pull/56562
+[rls/1171]: https://github.com/rust-lang/rls/issues/1171
+[rls/1170]: https://github.com/rust-lang/rls/pull/1170
+
 Version 1.31.0 (2018-12-06)
 ==========================
 

src/Cargo.lock

@@ -65,3 +65,8 @@ rustc-workspace-hack = { path = 'tools/rustc-workspace-hack' }
 [patch."https://github.com/rust-lang/rust-clippy"]
 clippy_lints = { path = "tools/clippy/clippy_lints" }
 rustc_tools_util = { path = "tools/clippy/rustc_tools_util" }
+
+# Old Clippy repository
+[patch."https://github.com/rust-lang-nursery/rust-clippy"]
+clippy_lints = { path = "tools/clippy/clippy_lints" }
+rustc_tools_util = { path = "tools/clippy/rustc_tools_util" }

src/Cargo.toml

@@ -40,7 +40,7 @@ filetime = "0.2"
 num_cpus = "1.0"
 getopts = "0.2"
 cc = "1.0.1"
-libc = "0.2"
+libc = "0.2.44"
 serde = "1.0.8"
 serde_derive = "1.0.8"
 serde_json = "1.0.2"

src/bootstrap/Cargo.toml

@@ -24,7 +24,7 @@ use Build;
 use config::Config;
 
 // The version number
-pub const CFG_RELEASE_NUM: &str = "1.31.0";
+pub const CFG_RELEASE_NUM: &str = "1.31.1";
 
 pub struct GitInfo {
     inner: Option<Info>,