* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Use SYMBOL_CALLS_LOCAL

	* elf32-i386.c (elf_i386_adjust_dynamic_symbol): Use SYMBOL_CALLS_LOCAL
	to trim plt entries.  Move undefweak non-default visibility test..
	(allocate_dynrelocs): ..from here.
	* elf32-ppc.c (ppc_elf_adjust_dynamic_symbol): Don't test
	dynamic_sections_created here.  Update comment.  Move undefweak
	non-default visibility test..
	(allocate_dynrelocs): ..from here.  Fix comment.
	* elf64-ppc.c (ppc64_elf_adjust_dynamic_symbol): Use SYMBOL_CALLS_LOCAL
	to trim plt entries.  Move undefweak non-default visibility test..
	(allocate_dynrelocs): ..from here.  Fix comment.
	* elflink.h (elf_link_output_extsym): Compare ELF_ST_VISIBILITY with
	STV_DEFAULT rather than comparing with zero.
	* elflink.c (_bfd_elf_merge_symbol): Likewise.
	(_bfd_elf_fix_symbol_flags): Likewise.  Format comment.