eval_intern.h: __builtin_longjmp requires literal 1 on gcc 4.9

* eval_intern.h (rb_threadptr_tag_jump): gcc 4.9 disallows other than
  literal 1 as the second argument of __builtin_longjmp().
  [ruby-core:61800] [Bug #9692]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45504 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

eval_intern.h

@@ -141,7 +141,8 @@ NORETURN(static inline void rb_threadptr_tag_jump(rb_thread_t *, int));
 static inline void
 rb_threadptr_tag_jump(rb_thread_t *th, int st)
 {
-    ruby_longjmp(th->tag->buf, (th->state = st));
+    th->state = st;
+    ruby_longjmp(th->tag->buf, 1);
 }
 
 /*