Comment 0 for bug 1971474

Update gdb to the final 12.1 release in 22.04 LTS. jammy ships with the gdb 12.1 release candidate, taken from the gdb-12 branch. Changes up to the final release are:

 - updated gnulib library
 - Fix for PR mi/29002 (Windows only)
 - gdb: fix 'remote show FOO-packet' aliases
 - various testsuite fixes
 - fixing compiler warnings
 - Fix bug in Ada number lexing
 - Remove "Ada Settings" node from the manual
 - Handle TLS variable lookups when using separate debug files.
 - PR 28980: gdb: don't copy entirely optimized out values in value_copy
 - gdb/mi: fix use after free of frame_info causing spurious notifications

Comparing the test results between the two builds doesn't show any regression on any architecture.