[moses-smt/mosesdecoder] be7e78: Use tcmalloc with multithread if detected.

[GitHub <no...@gi...>]

  Branch: refs/heads/master
  Home:   https://github.com/moses-smt/mosesdecoder
  Commit: be7e78c6bf6832f57905b48890520a5c7e3d7c3b
      https://github.com/moses-smt/mosesdecoder/commit/be7e78c6bf6832f57905b48890520a5c7e3d7c3b
  Author: Kenneth Heafield <gi...@kh...>
  Date:   2012-11-14 (Wed, 14 Nov 2012)

  Changed paths:
    M Jamroot

  Log Message:
  -----------
  Use tcmalloc with multithread if detected.

Change option and documentation to --without-tcmalloc.