fix ffi warnings

Author: bobzhang

jscomp/test/exception_raise_test.ml

@@ -1,4 +1,4 @@
-
+[@@@warning "-22"]
 
 exception Local
 exception B of int list 

jscomp/test/ffi_arity_test.js

@@ -170,7 +170,7 @@ function bar(fn) {
   return Curry._1(fn, /* () */0);
 }
 
-(Curry._1(function (){console.log("forgiving arity")}, /* () */0));
+(Curry._1((function(){console.log("forgiving arity")}), /* () */0));
 
 exports.f = f;
 exports.v = v;

jscomp/test/ffi_arity_test.ml

@@ -61,4 +61,4 @@ let () = g () [@bs]
 let bar fn = fn ()
 (* let hh0001 = fun%raw a b -> {| a + b|}
 let hh0002 = fun%raw () -> {| console.log ("forgiving arity")|}  *)
-;; bar (fun%raw () -> {|console.log("forgiving arity")|} )
+;; bar [%raw {|function(){console.log("forgiving arity")}|}]

jscomp/test/gpr_2682_test.ml

@@ -1,4 +1,4 @@
-
+[@@@warning "-22"]
 (* [@@@bs.config no_export] *)
 (* let for_each n =
   ([%raw{|

jscomp/test/raw_output_test.ml

@@ -1,3 +1,4 @@
+[@@@warning "-22"]
 let mk fn = fn ()