Update Cargo submodule and its dependencies

Hopefully just another routine update!

So far this starts to enable the `std::arch` in stage0 builds of rustc.
This means that we may need stage0/not(stage0) in stdsimd itself, but
more and more code is starting to use `std::arch` so I think it's time
to start shifting the balance of work here.

src/libcore/lib.rs

@@ -250,9 +250,7 @@ macro_rules! vector_impl { ($([$f:ident, $($args:tt)*]),*) => { $($f!($($args)*)
 #[path = "../stdsimd/coresimd/mod.rs"]
 #[allow(missing_docs, missing_debug_implementations, dead_code, unused_imports)]
 #[unstable(feature = "stdsimd", issue = "48556")]
-#[cfg(not(stage0))] // allow changes to how stdsimd works in stage0
 mod coresimd;
 
 #[stable(feature = "simd_arch", since = "1.27.0")]
-#[cfg(not(stage0))]
 pub use coresimd::arch;

src/libstd/lib.rs

@@ -287,7 +287,7 @@
 #![feature(rustc_attrs)]
 #![feature(rustc_const_unstable)]
 #![feature(std_internals)]
-#![cfg_attr(not(stage0), feature(stdsimd))]
+#![feature(stdsimd)]
 #![feature(shrink_to)]
 #![feature(slice_concat_ext)]
 #![feature(slice_internals)]
@@ -514,18 +514,17 @@ pub mod rt;
 #[path = "../stdsimd/stdsimd/mod.rs"]
 #[allow(missing_debug_implementations, missing_docs, dead_code)]
 #[unstable(feature = "stdsimd", issue = "48556")]
-#[cfg(all(not(stage0), not(test)))]
+#[cfg(not(test))]
 mod stdsimd;
 
 // A "fake" module needed by the `stdsimd` module to compile, not actually
 // exported though.
-#[cfg(not(stage0))]
 mod coresimd {
     pub use core::arch;
 }
 
 #[stable(feature = "simd_arch", since = "1.27.0")]
-#[cfg(all(not(stage0), not(test)))]
+#[cfg(not(test))]
 pub use stdsimd::arch;
 
 // Include a number of private modules that exist solely to provide

src/libsyntax_pos/analyze_source_file.rs

@@ -47,8 +47,7 @@ pub fn analyze_source_file(
 }
 
 cfg_if! {
-    if #[cfg(all(any(target_arch = "x86", target_arch = "x86_64"),
-                 not(stage0)))] {
+    if #[cfg(all(any(target_arch = "x86", target_arch = "x86_64")))] {
         fn analyze_source_file_dispatch(src: &str,
                                     source_file_start_pos: BytePos,
                                     lines: &mut Vec<BytePos>,

src/tools/tidy/src/deps.rs

@@ -52,6 +52,7 @@ const EXCEPTIONS: &[&str] = &[
     "ryu",                // Apache-2.0, rls/cargo/... (b/c of serde)
     "bytesize",           // Apache-2.0, cargo
     "im-rc",              // MPL-2.0+, cargo
+    "adler32",            // BSD-3-Clause AND Zlib, cargo dep that isn't used
 ];
 
 /// Which crates to check against the whitelist?
@@ -62,19 +63,23 @@ const WHITELIST_CRATES: &[CrateVersion] = &[
 
 /// Whitelist of crates rustc is allowed to depend on. Avoid adding to the list if possible.
 const WHITELIST: &[Crate] = &[
+    Crate("adler32"),
     Crate("aho-corasick"),
     Crate("arrayvec"),
     Crate("atty"),
     Crate("backtrace"),
     Crate("backtrace-sys"),
     Crate("bitflags"),
+    Crate("build_const"),
     Crate("byteorder"),
     Crate("cc"),
     Crate("cfg-if"),
     Crate("chalk-engine"),
     Crate("chalk-macros"),
     Crate("cloudabi"),
     Crate("cmake"),
+    Crate("crc"),
+    Crate("crc32fast"),
     Crate("crossbeam-deque"),
     Crate("crossbeam-epoch"),
     Crate("crossbeam-utils"),
@@ -100,6 +105,8 @@ const WHITELIST: &[Crate] = &[
     Crate("memmap"),
     Crate("memoffset"),
     Crate("miniz-sys"),
+    Crate("miniz_oxide"),
+    Crate("miniz_oxide_c_api"),
     Crate("nodrop"),
     Crate("num_cpus"),
     Crate("owning_ref"),
@@ -109,7 +116,12 @@ const WHITELIST: &[Crate] = &[
     Crate("polonius-engine"),
     Crate("quick-error"),
     Crate("rand"),
+    Crate("rand_chacha"),
     Crate("rand_core"),
+    Crate("rand_hc"),
+    Crate("rand_isaac"),
+    Crate("rand_pcg"),
+    Crate("rand_xorshift"),
     Crate("redox_syscall"),
     Crate("redox_termios"),
     Crate("regex"),
@@ -119,8 +131,12 @@ const WHITELIST: &[Crate] = &[
     Crate("rustc-hash"),
     Crate("rustc-rayon"),
     Crate("rustc-rayon-core"),
+    Crate("rustc_version"),
     Crate("scoped-tls"),
     Crate("scopeguard"),
+    Crate("semver"),
+    Crate("semver-parser"),
+    Crate("serde"),
     Crate("smallvec"),
     Crate("stable_deref_trait"),
     Crate("tempfile"),
@@ -132,9 +148,9 @@ const WHITELIST: &[Crate] = &[
     Crate("unicode-width"),
     Crate("unreachable"),
     Crate("utf8-ranges"),
+    Crate("vcpkg"),
     Crate("version_check"),
     Crate("void"),
-    Crate("vcpkg"),
     Crate("winapi"),
     Crate("winapi-build"),
     Crate("winapi-i686-pc-windows-gnu"),