x86: Correct _bfd_x86_elf_copy_indirect_symbol comments

x86: Correct _bfd_x86_elf_copy_indirect_symbol comments

Since

commit eeb2f20a764bee3a6a1edb9872467d044aaad848
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Fri Sep 1 13:03:40 2017 -0700

    x86: Add _bfd_x86_elf_adjust_dynamic_symbol

replaced elf_i386_adjust_dynamic_symbol with
_bfd_x86_elf_copy_indirect_symbol, correct the comments.

	* elfxx-x86.c (_bfd_x86_elf_copy_indirect_symbol): Replace
	elf_i386_adjust_dynamic_symbol with
	_bfd_x86_elf_copy_indirect_symbol in comments.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>