is_target_special_symbol fixes for commit 68bbe1183379

	* elf.c (_bfd_elf_is_local_label_name): Don't segv on NULL name.
	* elf32-v850.c (v850_elf_is_local_label_name): Likewise.
	* elfnn-riscv.c (riscv_elf_is_target_special_symbol): Likewise.
3 files changed