Add X25519 bindings for bssl-crypto

Bug: 285222831
Change-Id: I35219ac312fd97e7a51af8156c73fa7eb38c17c2
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/60268
Commit-Queue: Bob Beck <bbe@google.com>
Reviewed-by: Bob Beck <bbe@google.com>

rust/bssl-crypto/src/lib.rs

diff --git a/rust/bssl-crypto/src/lib.rs b/rust/bssl-crypto/src/lib.rs
index 0ad352d..cd40b81 100644
--- a/rust/bssl-crypto/src/lib.rs
+++ b/rust/bssl-crypto/src/lib.rs
@@ -50,6 +50,9 @@
 /// Random number generation.
 pub mod rand;
 
+/// X25519 elliptic curve operations.
+pub mod x25519;
+
 /// Memory-manipulation operations.
 pub mod mem;