Пакет rpm-build: Информация

- george@:
  + scripts/brp-fix-perms.in: Fixed systemd units and man/info permissions.
  + scripts/brp-verify-unit.in: Dropped validation of already fixed permissions.
  + scripts/brp-compress.in: Moved permission fix to brp-fix-perms.

- Moved scripts/find-package and scripts/functions over from our rpm project to
  be installed as part of rpm-build.

- debuginfo: Changed compression format (--lzma2=dict=2MiB ->
  --check=crc32 --lzma2=dict=1MiB) of xz-compressed modules for compatibility
  with kmod >= 31 (thx asheplyakov@).
- Introduced brp-verify-unit to check sanity of systemd units included
  in built packages.