Update gdb to 7.11. am: c7b00463e2 am: 87693563e6 am: 96e6342587
am: d074438b39

* commit 'd074438b392ce416cfc8450b335447cabd8159a9':
  Update gdb to 7.11.

Change-Id: Ib3642aa0997c2dfe21d0032520e35ad31f444cfc