* elf-m10200.c (mn10200_elf_relax_section): Cast assignment to
Elf_Internal_Shdr.contents now that it's no longer a PTR.
* elf-m10300.c (mn10300_elf_relax_section): Likewise.
* elf32-h8300.c (elf32_h8_relax_section): Likewise.
* elf32-m68k.c (bfd_m68k_elf32_create_embedded_relocs): Likewise.
* elf32-sh.c (sh_elf_relax_section): Likewise.
* elf64-alpha.c (elf64_alpha_relax_section): Likewise.
* elfxx-ia64.c (elfNN_ia64_relax_section): Likewise.
* elf.c (setup_group): Warning fixes.
* elflink.h (elf_link_sort_relocs): Likewise.
* pdp11.c (slurp_reloc_table): Likewise.