(struct misc): New field isymbuf. All free_* fields removed.
(symbol_value): Pass in internal syms. No need to swap syms in.
(ip2k_elf_relax_section): Use bfd_elf_get_elf_syms. Properly free
possibly cached info.
(tidyup_after_error): Removed.
(ip2k_elf_relax_section_pass1): Don't use removed fields of struct
misc. Use new field.
(adjust_all_relocations): Use internal syms. No need to swap syms
in and out.
(add_page_insn): Don't use removed fields of struct misc.