* addr2line.c (rb_dump_backtrace_with_lines): set base address
  which is retrived from dladdr to dladdr_fbases, to skip already
  parsed objects.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45563 b2dd03c8-39d4-4d8f-98ff-823fe69b080e