boost: Package Version Update -> 1.64.0

boost: Package Version Update -> 1.64.0

Maintainer: @ClaymorePT
Compile tested: Broadcom BCM2708
Run tested: None

Description:
 - New header-only library -> Process
   -> Process library by Klemens D. Morgenstern, that provides cross
        platorm ways to allows you to:
      - create child processes
      - setup streams for child processes
      - communicate with child processes through streams
          (synchronously or asynchronously)
      - wait for processes to exit (synchronously or asynchronously)
      - terminate processes

Information about the 1.64.0 release (updated libraries, bug fixes,
 etc), can be found here [1].

[1]: http://www.boost.org/users/history/version_1_64_0.html

Signed-off-by: Carlos Miguel Ferreira <carlosmf.pt@gmail.com>