* string.c (fstr_update_callback): do not use rb_gc_resurrect()
  any more.
  Make new frozen string and replace with garbage frozen string.
* common.mk: use gc.h from string.c.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46727 b2dd03c8-39d4-4d8f-98ff-823fe69b080e