am c2c68a78: Change bsdiff to use divsufsort suffix sort library instead of qsufsort. Divsufsort is more efficient and addresses the problem of bsdiff hanging on certain files.

* commit 'c2c68a78ac72e056cf23b7017206f8a530c0aa63':
  Change bsdiff to use divsufsort suffix sort library instead of qsufsort. Divsufsort is more efficient and addresses the problem of bsdiff hanging on certain files.