Fix these warnings when building on arm/hppa/ia64/sparc:
scanelf.c: In function `scanelf_file_textrel':
scanelf.c:241: warning: cast increases required alignment of target type
scanelf.c:242: warning: cast increases required alignment of target type
due to:
	dyn = DYN ## B (elf->data + offset); \
	rel = REL ## B (elf->data + EGET(shdr[s].sh_offset)); \
	rela = RELA ## B (elf->data + EGET(shdr[s].sh_offset)); \
	sym = SYM ## B (elf->data + EGET(symtab->sh_offset)); \