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

1 files changed, 7 insertions, 11 deletions

diff --git a/rand/build.rs b/rand/build.rs
index e44b643..a554ad9 100644
--- a/rand/build.rs
+++ b/rand/build.rs
@@ -1,14 +1,10 @@
-extern crate rustc_version;
-use rustc_version::{version, Version};
+extern crate autocfg;
 
 fn main() {
-    if version().unwrap() >= Version::parse("1.25.0").unwrap() {
-        println!("cargo:rustc-cfg=rust_1_25");
-    }
-    if version().unwrap() >= Version::parse("1.26.0").unwrap() {
-        println!("cargo:rustc-cfg=rust_1_26");
-    }
-    if version().unwrap() >= Version::parse("1.27.0").unwrap() {
-        println!("cargo:rustc-cfg=rust_1_27");
-    }
+    println!("cargo:rerun-if-changed=build.rs");
+
+    let ac = autocfg::new();
+    ac.emit_rustc_version(1, 25);
+    ac.emit_rustc_version(1, 26);
+    ac.emit_rustc_version(1, 27);
 }