Upgrade submodule, sync patch and code.

Upgrade submodule, sync patch and code.

Several gdb function arguments and structure members are now unique pointer
types event_location_up and command_line_up instead of struct event_location *
and struct command_line * respectively.
Code changes in this commit adapt the insight-specfic code to this situation.

* gdbtk/generic/gdbtk-bp.c (gdb_get_breakpoint_info): convert breakpoint
  location to a regular pointer.
  (gdb_set_bp): use an event_location_up local variable.
  No more cleanup needed.
  (gdb_actions_command): use a command_line_up local variable.
  (tracepoint_exists): use an event_location_up local variable.
  No more cleanup needed.
* gdbtk/generic/gdbtk-cmds.c (gdb_get_line_command): likewise.
  (gdb_get_file_command): likewise.
  (gdb_get_function_command): likewise.
* gdbtk/generic/gdbtk-stack.c (gdb_get_vars_command): likewise.