[D-runtime] [D-Programming-Language/druntime] a29233: Add missing imports

[GitHub via D-runtime]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: a29233d086524e28ccf1d519e3007e9fb2be1fca
      https://github.com/D-Programming-Language/druntime/commit/a29233d086524e28ccf1d519e3007e9fb2be1fca
  Author: k-hara <k.hara.pg at gmail.com>
  Date:   2015-01-07 (Wed, 07 Jan 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  Add missing imports


  Commit: e0114403372d7696526ef0c2072e3ba8650f8bc2
      https://github.com/D-Programming-Language/druntime/commit/e0114403372d7696526ef0c2072e3ba8650f8bc2
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-01-06 (Tue, 06 Jan 2015)

  Changed paths:
    M src/core/thread.d

  Log Message:
  -----------
  Merge pull request #1086 from 9rnsr/fix12359

Add missing imports


Compare: https://github.com/D-Programming-Language/druntime/compare/19a7fd177755...e0114403372d