[interpreter] Fix source position of yield-exceptions in generators.

test/message/generators-throw2.js

Index: test/message/generators-throw2.js
diff --git a/test/message/new-target-escaped.js b/test/message/generators-throw2.js
similarity index 64%
copy from test/message/new-target-escaped.js
copy to test/message/generators-throw2.js
index f8398bebd4dda6d8568b3f80cbc85ed2c6d6710e..b805bbcba17e1ec5d4ccbe8b5e6cfb37711690e2 100644
--- a/test/message/new-target-escaped.js
+++ b/test/message/generators-throw2.js
@@ -2,9 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
-//
+// Flags: --ignition-generators
+
+function* f() { yield }
 
-function f() {
-  return new.t\u0061rget;
-}
-var o = new f();
+let g = f();
+g.next();
+g.throw(42);