remove rand crate

the few uses of rand::thread_rng() have been replaced with either
prngs or reads from /dev/urandom. the implementations are under
the `rand_ish` minicrate.

`protoc-rust` depends on `tempdir`, which relies on rand, so
`tempdir` has been patched with a rewritten version that does not
have rand as a dependency.

BUG=chromium:921795
TEST=cargo test --features plugin

Change-Id: I6f1c7d7a1aeef4dd55ac71e58294d16c291b8871
Reviewed-on: https://chromium-review.googlesource.com/1409705
Commit-Ready: Daniel Prilik <prilik@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/tempdir/Cargo.toml b/tempdir/Cargo.toml
new file mode 100644
index 0000000..9a3bed9
--- /dev/null
+++ b/tempdir/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "tempdir"
+version = "0.3.5"
+authors = ["The Chromium OS Authors"]
+
+[dependencies]
+rand_ish = { path = "../rand_ish" }