chore: update to xpack arm-none-eabi-gcc v15.2.1-1.1

[fpistm]

https://github.com/xpack-dev-tools/arm-none-eabi-gcc-xpack/releases/tag/v15.2.1-1.1

/cc @ilg-ul

[fpistm]

Seems this new version of gcc introduces a regression. gcc crash due to a segmentation fault.

|  7/462   | BLACKPILL_F303CC                           |   failed   | 23.89 s |
during RTL pass: ce1
In file included from /github/home/.arduino15/packages/STMicroelectronics/tools/CMSIS_DSP/1.17.0/Include/../Source/BasicMathFunctions/BasicMathFunctions.c:32,
                 from /github/home/.arduino15/packages/STMicroelectronics/hardware/stm32/3.0.0-dev/libraries/CMSIS_DSP/src/BasicMathFunctions/BasicMathFunctions.c:1:
/github/home/.arduino15/packages/STMicroelectronics/tools/CMSIS_DSP/1.17.0/Include/../Source/BasicMathFunctions/arm_abs_q31.c: In function 'arm_abs_q31':
/github/home/.arduino15/packages/STMicroelectronics/tools/CMSIS_DSP/1.17.0/Include/../Source/BasicMathFunctions/arm_abs_q31.c:206:1: internal compiler error: Segmentation fault
  206 | }
      | ^
0x1b8ae85 diagnostic_context::diagnostic_impl(rich_location*, diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag (*) [1], diagnostic_t)
	???:0
0x1b9ae9f internal_error(char const*, ...)
	???:0
0x929c10 copy_to_mode_reg(machine_mode, rtx_def*)
	???:0
0xbd3b86 maybe_legitimize_operands(insn_code, unsigned int, unsigned int, expand_operand*)
	???:0
0xbd0f19 maybe_gen_insn(insn_code, unsigned int, expand_operand*)
	???:0
0xbd3000 emit_conditional_move(rtx_def*, rtx_comparison, rtx_def*, rtx_def*, machine_mode, int)
	???:0
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.

So I will keep the current version and investigate later on this issue. It seems this error is already reported at gcc side.

[ilg-ul]

Unless you are pretty certain this is a known bug, I suggest you open a ticket to Arm GCC / GCC, to be sure the issue is addressed in future releases.