x32/asm_stat.h: provide definitions for i386 personality
x32/asm_stat.h: provide definitions for i386 personality

This enables x32/asm_stat.h with -m32.

* linux/x32/asm_stat.h [__x86_64__ && __ILP32__]: Redirect stat.
Include "linux/asm_stat.h".
(struct stat): Define for [__x86_64__ && __ILP32__] only.
(struct __old_kernel_stat): Remove.

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