* pe-dll.c (autofilter_entry_type): Change name to const.

* pe-dll.c (autofilter_entry_type): Change name to const.
(pe_details_type) : Change target_name, object_target and autofilter_symbollist
to const.
(autofilter_symbollist_generic): Change to const.
(autofilter_symbollist_i386, pe_detail_list, pe_details, autofilter_liblist,
autofilter_objlist autofilter_symbolprefixlist, autofilter_symbolsuffixlist):
Likewise.
(is_import): Fix indentation.
(auto_export): Change afptr to const.  Move name declaration to beginning of
scope.
(make_tail): Clear undefined byte.
(jmp_ix86_bytes, jmp_sh_bytes, jmp_mips_bytes, jmp_arm_bytes): Change to const.
(make_one): Change jmp_bytes to const.  Make idata$6 member size arithmetic
explicit and add comment.