[D-runtime] [D-Programming-Language/druntime] : add core.simd

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: 9eff7cdfd6da042bc5cfe36b5bde162b5316a0f2
      https://github.com/D-Programming-Language/druntime/commit/9eff7cdfd6da042bc5cfe36b5bde162b5316a0f2
  Author: Walter Bright <walter at walterbright.com>
  Date:   2012-01-11 (Wed, 11 Jan 2012)

  Changed paths:
    M posix.mak
  A src/core/simd.d
  M win32.mak

  Log Message:
  -----------
  add core.simd