Log Message:
Set version to 20150410 and cleanup the package

Changes against sysutils/acpica-utils
- Upgrade from to 20150410
  Changelog: https://github.com/acpica/acpica/blob/master/documents/changes.txt

- New dual license: modified-bsd OR gnu-gpl-v2

- Add new category: sysutils

- NetBSD has sem_timedwait(). Hey I miss the .Sh HISTORY notes about it!

- Drop local tweaks for DragonflyBSD. For this platform please see new
  upstream patch:
  https://github.com/acpica/acpica/commit/3e93431674abe947202b0f9a0afa7b625b17caa6