bfd/elf-ifunc.c: Remove unused function _bfd_elf_create_ifunc_dyn_reloc.

bfd/ChangeLog:

2013-05-07  Will Newton  <will.newton@linaro.org>

        * elf-ifunc.c (_bfd_elf_create_ifunc_dyn_reloc): Remove unused
	function.
	* elf-bfd.h: Likewise.
bfd/elf-ifunc.c: Add header size arg to _bfd_elf_allocate_ifunc_dyn_relocs.

bfd/ChangeLog:

2013-05-07  Will Newton  <will.newton@linaro.org>

	* elf-ifunc.c (_bfd_elf_allocate_ifunc_dyn_relocs): Add a
	plt_header_size argument for ports where it differs from
	plt_entry_size.
	* elf-bfd.h: Likewise.
	* elf32-i386.c: Pass plt_header_size to
	_bfd_elf_allocate_ifunc_dyn_relocs.
	* elf64-x86-64.c: Likewise.