Update nitrokey crate to 0.3.3

This change updates the nitrokey crate to version 0.3.3. Along with that
change we update rand to 0.6.4 because rand 0.6.1 does not yet contain a
publicly accessible rand_os. Note that we no longer require all
crates in rand's workspace, but only rand_os and rand_core, which is a
significant reduction in the number of lines of code compiled.

Import subrepo nitrokey/:nitrokey at 7cf747d56ddc0b7eeedc3caf36dcc909907a171c
Import subrepo rand/:rand at 4336232dda03323634b10ec72ddf27914aebc3a2

5 files changed, 14 insertions, 10 deletions

diff --git a/rand/rand_pcg/CHANGELOG.md b/rand/rand_pcg/CHANGELOG.md
index d37408d..6f793cf 100644
--- a/rand/rand_pcg/CHANGELOG.md
+++ b/rand/rand_pcg/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.2] - unreleased
+- potential blocker: https://github.com/TyOverby/bincode/issues/250
+- make `bincode` a dev-dependency again
+- clean up tests and Serde support
+
 ## [0.1.1] - 2018-10-04
 - make `bincode` an explicit dependency when using Serde
 
diff --git a/rand/rand_pcg/Cargo.toml b/rand/rand_pcg/Cargo.toml
index c8a29fc..c2fcb7d 100644
--- a/rand/rand_pcg/Cargo.toml
+++ b/rand/rand_pcg/Cargo.toml
@@ -34,4 +34,4 @@ serde_derive = { version = "^1.0.38", optional = true }
 bincode = { version = "1", features = ["i128"] }
 
 [build-dependencies]
-rustc_version = "0.2"
+autocfg = "0.1"
diff --git a/rand/rand_pcg/build.rs b/rand/rand_pcg/build.rs
index cb3ae20..06e12a4 100644
--- a/rand/rand_pcg/build.rs
+++ b/rand/rand_pcg/build.rs
@@ -1,8 +1,7 @@
-extern crate rustc_version;
-use rustc_version::{version, Version};
+extern crate autocfg;
 
 fn main() {
-    if version().unwrap() >= Version::parse("1.26.0").unwrap() {
-        println!("cargo:rustc-cfg=rust_1_26");
-    }
+    println!("cargo:rerun-if-changed=build.rs");
+    let ac = autocfg::new();
+    ac.emit_rustc_version(1, 26);
 }
diff --git a/rand/rand_pcg/src/lib.rs b/rand/rand_pcg/src/lib.rs
index 5160e87..9648e85 100644
--- a/rand/rand_pcg/src/lib.rs
+++ b/rand/rand_pcg/src/lib.rs
@@ -36,13 +36,13 @@
 
 #![no_std]
 
-extern crate rand_core;
+pub extern crate rand_core;
 
 #[cfg(feature="serde1")] extern crate serde;
 #[cfg(feature="serde1")] #[macro_use] extern crate serde_derive;
 
 mod pcg64;
-#[cfg(rust_1_26)] mod pcg128;
+#[cfg(all(rustc_1_26, not(target_os = "emscripten")))] mod pcg128;
 
 pub use self::pcg64::{Pcg32, Lcg64Xsh32};
-#[cfg(rust_1_26)] pub use self::pcg128::{Pcg64Mcg, Mcg128Xsl64};
+#[cfg(all(rustc_1_26, not(target_os = "emscripten")))] pub use self::pcg128::{Pcg64Mcg, Mcg128Xsl64};
diff --git a/rand/rand_pcg/tests/mcg128xsl64.rs b/rand/rand_pcg/tests/mcg128xsl64.rs
index 2508917..3279536 100644
--- a/rand/rand_pcg/tests/mcg128xsl64.rs
+++ b/rand/rand_pcg/tests/mcg128xsl64.rs
@@ -1,4 +1,4 @@
-#![cfg(rust_1_26)]
+#![cfg(rustc_1_26)]
 extern crate rand_pcg;
 extern crate rand_core;
 #[cfg(all(feature="serde1", test))] extern crate bincode;