[RTEMS Project] #4859: Update gdb to 12.1

[RTEMS trac]

#4859: Update gdb to 12.1
----------------------------+--------------------
  Reporter:  Joel Sherrill  |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  normal         |  Milestone:  6.1
 Component:  tool/gdb       |    Version:
  Severity:  normal         |   Keywords:
Blocked By:                 |   Blocking:
----------------------------+--------------------
 While investigating the build issue tracked as #4858, I tried bumping the
 gdb to 12.1 hoping it included the fix. But it did not. This bumps the
 default gdb to 12.1 with the same patch.

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Ticket URL: <http://devel.rtems.org/ticket/4859>
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