Add advisory for data race in aovec (#528)

crates/aovec/RUSTSEC-0000-0000.md

@@ -0,0 +1,20 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "aovec"
+date = "2020-12-10"
+categories = ["memory-corruption"]
+keywords = ["concurrency"]
+
+[versions]
+patched = []
+```
+
+# Aovec<T> lacks bound on its Send and Sync traits allowing data races
+
+`aovec::Aovec<T>` is a vector type that implements `Send` and `Sync` for all
+types `T`.
+
+This allows non-Send types such as `Rc` and non-Sync types such as `Cell` to
+be used across thread boundaries which can trigger undefined behavior and
+memory corruption.