R13B03 binary vheap有助减少binary内存压力

    OTP-8202  A new garbage collecting strategy for binaries which is more
      aggressive than the previous implementation. Binaries now has
      a virtual binary heap tied to each process. When binaries are
      created or received to a process it will check if the heap
      limit has been reached and if a reclaim should be done. This
      imitates the behavior of ordinary Erlang terms. The virtual
      heaps are grown and shrunk like ordinary heaps. This will
      lessen the memory footprint of binaries in a system.