- Add patch file-5.13-return.patch: avoid doubled return

- Update to file version 5.13 (mainly bug fixes)
* add elf reading of debug info to determine if file is stripped
* use pread()
* change mime description size from 64 to 80 to accommodate OOXML.
* Warn about inconsistent continuation levels.
* Change fsmagic to add a space after it prints.
* Make getline public so that file can link against it.
Perhaps it is better to rename it, or hide it differently.
Fixes builds on platforms that do not provide it.
* Add SuS d{,1,2,4,8}, u{,1,2,4,8} and document
what long, int, short, etc is (Guy Harris)
* add magic_version function and constant
* Redo memory allocation and de-allocation.
(prevents double frees on non mmap platforms)
* Fix bug with name/use having to do with passing
found state from the parent to the child and back.