[glibc] powerpc: Update acosf ulps

[Andreas Schwab]

On Jan 02 2025, Florian Weimer wrote:

> * Adhemerval Zanella Netto:
>
>> Because gcc complains due how math_opt_barrier is implemented:
>>
>> ../sysdeps/ieee754/flt-32/e_acosf.c: In function ‘__ieee754_acosf’:
>> ../sysdeps/aarch64/fpu/math-barriers.h:23:30: error: read-only variable ‘__x’ used as ‘asm’ output
>>    23 |   ({ __typeof (x) __x = (x); __asm ("" : "+w" (__x)); __x; })
>>       |                              ^~~~~
>> ../sysdeps/ieee754/flt-32/e_acosf.c:94:16: note: in expansion of macro ‘math_opt_barrier’
>>    94 |         return math_opt_barrier (pi2);
>>       |                ^~~~~~~~~~~~~~~~
>
> We can fix this by using __typeof (+x).  It removes the const qualifier,

C23 has typeof_unqual.

-- 
Andreas Schwab, schwab@linux-m68k.org
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