Rename bssl-ffi to bssl-sys

Test: TreeHugger
Change-Id: I7e8e1a73d47e2fbdf81a4d6b51d7d11cea56db35
diff --git a/libs/bssl/src/cbb.rs b/libs/bssl/src/cbb.rs
index 9b5f7fe..a48c714 100644
--- a/libs/bssl/src/cbb.rs
+++ b/libs/bssl/src/cbb.rs
@@ -14,7 +14,7 @@
 
 //! Helpers for using BoringSSL CBB (crypto byte builder) objects.
 
-use bssl_ffi::{CBB_init_fixed, CBB};
+use bssl_sys::{CBB_init_fixed, CBB};
 use core::marker::PhantomData;
 use core::mem::MaybeUninit;