Add 'brolib-sml/' from commit 'fd96032949434207dda3b288f48d7fe579f59e4e'

git-subtree-dir: brolib-sml
git-subtree-mainline: 64471ecf7f
git-subtree-split: fd96032949

brolib-sml/bench/transaction.sml

@@ -0,0 +1,9 @@
+signature TRANSACTION =
+sig
+  type t
+  val empty: t
+  val insert: int * string * t -> t
+  val delete: int * int * t -> t
+  val toString: t -> string
+  val txns : (int * int * string) vector
+end