extra/ocaml: add patch

extra/ocaml/arm.patch

@@ -0,0 +1,22 @@
+diff --git a/asmcomp/CSEgen.ml b/asmcomp/CSEgen.ml
+index 19019e1..260e4fa 100644
+--- a/asmcomp/CSEgen.ml
++++ b/asmcomp/CSEgen.ml
+@@ -180,7 +180,8 @@ method private keep_checkbounds n =
+ (* Perform CSE on the given instruction [i] and its successors.
+    [n] is the value numbering current at the beginning of [i]. *)
+ 
+-method private cse n i =
++method private cse n i = i
++(*
+   match i.desc with
+   | Iend | Ireturn | Iop(Itailcall_ind) | Iop(Itailcall_imm _)
+   | Iexit _ | Iraise _ ->
+@@ -262,6 +263,7 @@ method private cse n i =
+       {i with desc = Itrywith(self#cse n body,
+                               self#cse empty_numbering handler);
+               next = self#cse empty_numbering i.next}
++*)
+ 
+ method fundecl f =
+   {f with fun_body = self#cse empty_numbering f.fun_body}