SHF_PROGBITS or SHT_STRTAB section if SEC_ALLOC is set. Never set
SEC_DATA for a SHF_NOBITS section.
* nlm32-i386.c (nlm_i386_mangle_relocs): Check SEC_LOAD rather
than SEC_CODE | SEC_DATA. Add some casts to avoid warnings.
* nlmcode.h: Add some casts to avoid warnings.
(nlm_write_object_contents): Ignore relocs for sections that are
neither code nor data. Just use the symbol value for debugging
symbols; don't offset by the section vma.