Rearrange PLT reloc output on powerpc

Rearrange PLT reloc output on powerpc

The current scheme where we output PLT relocs for global symbols in
finish_dynamic_symbol, and PLT relocs for local symbols when
outputting stubs does not work if PLT entries are to be used for
inline PLT sequences against non-dynamic globals or local symbols.

bfd/
	* elf64-ppc.c (ppc_build_one_stub): Move output of PLT relocs
	for local symbols to..
	(write_plt_relocs_for_local_syms): ..here.  New function.
	(ppc64_elf_finish_dynamic_symbol): Move output of PLT relocs for
	global symbols to..
	(build_global_entry_stubs_and_plt): ..here.  Rename from
	build_global_entry_stubs.
	(ppc64_elf_build_stubs): Always call build_global_entry_stubs_and_plt.
	Call write_plt_relocs_for_local_syms.
	* elf32-ppc.c (get_sym_h): New function.
	(ppc_elf_relax_section): Use get_sym_h.
	(ppc_elf_relocate_section): Move output of PLT relocs and glink
	stubs for local symbols to..
	(ppc_finish_symbols): ..here.  New function.
	(ppc_elf_finish_dynamic_symbol): Move output of PLT relocs for
	global syms to..
	(write_global_sym_plt): ..here.  New function.
	* elf32-ppc.h (ppc_elf_modify_segment_map): Delete attribute.
	(ppc_finish_symbols): Declare.
ld/
	* ppc32elf.em (ppc_finish): Call ppc_finish_symbols.