Log Message:
Update security/{,py-yara} to version 3.5.0

The release notes mention:

  * Match length operator \ 
(http://yara.readthedocs.io/en/v3.5.0/writingrules.html#match-length)
  * Performance improvements
  * Less memory consumption while scanning processes
  * Exception handling when scanning memory blocks
  * Negative integers in meta fields
  * Added the --stack-size command-argument
  * Functions import_ordinal, is_dll, is_32bit and is_64bit added to PE module
  * Functions rich_signature.toolid and rich_signature.version added to PE module
  * Lots of bug fixes

The Python bindings are now released from a different tree, with the same
versioning apparently though.

"welcome to update" pettai@