toolchain: gdb: Update to version 11.2

toolchain: gdb: Update to version 11.2

This is a minor corrective release over GDB 11.1, fixing the following issues:
* PR sim/28302 (gdb fails to build with glibc 2.34)
* PR build/28318 (std::thread support configure check does not use CXX_DIALECT)
* PR gdb/28405 (arm-none-eabi: internal-error: ptid_t remote_target::select_thread_for_ambiguous_stop_reply(const target_waitstatus*): Assertion `first_resumed_thread != nullptr' failed)
* PR tui/28483 ([gdb/tui] breakpoint creation not displayed)
* PR build/28555 (uclibc compile failure since commit 4655f8509fd44e6efabefa373650d9982ff37fd6)
* PR rust/28637 (Rust characters will be encoded using DW_ATE_UTF)
* PR gdb/28758 (GDB 11 doesn't work correctly on binaries with a SHT_RELR (.relr.dyn) section)
* PR gdb/28785 (Support SHT_RELR (.relr.dyn) section)

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>