Update gdb to 7.11. am: 5102a42dbb am: 9d880ed315
am: 2520c7d047

* commit '2520c7d047d6dff54e12e1750b0652eee580ddc6':
  Update gdb to 7.11.

Change-Id: Iff9d5ff55fc16635a1ea26c87e84be32e119d1ef