[GR-14657] Fix missing --polyglot in js interop tests.

PullRequest: truffleruby/739

Author: eregon

test/truffle/integration/backtraces.sh

@@ -7,7 +7,7 @@ do
   echo "$f"
   options=""
   if [ "$(basename "$f")" = "javascript.rb" ]; then
-    options="--experimental-options --single_threaded"
+    options="--polyglot --experimental-options --single_threaded"
   fi
   jt ruby --no-core-load-path $options "$f"
 done

test/truffle/integration/backtraces/javascript.backtrace

@@ -1,11 +1,11 @@
-/javascript.rb:19:in `foo': foo-message (RuntimeError)
+/javascript.rb:17:in `foo': foo-message (RuntimeError)
 	from (eval):1:in `bar'
-	from /javascript.rb:31:in `execute'
-	from /javascript.rb:31:in `bar'
-	from /javascript.rb:31:in `baz'
+	from /javascript.rb:29:in `execute'
+	from /javascript.rb:29:in `bar'
+	from /javascript.rb:29:in `baz'
 	from (eval):1:in `bob'
-	from /javascript.rb:43:in `execute'
-	from /javascript.rb:43:in `bob'
-	from /javascript.rb:43:in `block in <main>'
+	from /javascript.rb:41:in `execute'
+	from /javascript.rb:41:in `bob'
+	from /javascript.rb:41:in `block in <main>'
 	from /backtraces.rb:17:in `check'
-	from /javascript.rb:42:in `<main>'
+	from /javascript.rb:40:in `<main>'