[libc][C2y] mark functions [[unsequenced]]

[nickdesaulniers]

The C spec editor shared a copy of N3220 with me; I noticed a late addition that's not in N3096. stdbit.h function declarations get [[unsequenced]] function attributes. I should audit to see if there were other additions of [[unsequenced]] or [[reproducible]] to other library functions.

[llvmbot]

@llvm/issue-subscribers-libc

Author: Nick Desaulniers (nickdesaulniers)

The C spec editor shared a copy of N3220 with me; I noticed a late addition that's not in N3096. stdbit.h function declarations get [[unsequenced]] function attributes. I should audit to see if there were other additions of [[unsequenced]] or [[reproducible]] to other library functions.

[nickdesaulniers]

The C spec editor shared a copy of N3220 with me

That's the draft spec for C2y (which follows C23/C2X).