Source: https://github.com/smuellerDD/jitterentropy-library
Commit: 3804c8408e0152173ce9690c4618cc45541da2e8
License: Dual-licensed GPLv2/BSD-3-Clause
Version: 2.1.0

Modifications:
- Removed the following files, since they used different licenses or contained
  code from other projects with different licenses:
    * arch/
    * doc/jitterentropy.3
    * jitterentropy-base-user.h
 - Removed COPYING.gplv2
- Added rules.mk.
- Modified lib/jitterentropy/jitterentropy.h and jitterentropy-base.c.
- Added arch/*/include/lib/jitterentropy/internal.h.