[D-runtime] [D-Programming-Language/druntime] a0dc59: cleanup gc bits

[GitHub via D-runtime]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: a0dc59e739072eae445defa6e08ab26b831cf14f
      https://github.com/D-Programming-Language/druntime/commit/a0dc59e739072eae445defa6e08ab26b831cf14f
  Author: Martin Nowak <code at dawg.eu>
  Date:   2015-01-19 (Mon, 19 Jan 2015)

  Changed paths:
    M src/gc/bits.d
    M src/gc/gc.d

  Log Message:
  -----------
  cleanup gc bits

- remove unused sentinel offset
- always use core.bitop intrinsics


  Commit: ce6edc5ab8ae77a3f0605880ca1e465766f8b9fd
      https://github.com/D-Programming-Language/druntime/commit/ce6edc5ab8ae77a3f0605880ca1e465766f8b9fd
  Author: Iain Buclaw <ibuclaw at gdcproject.org>
  Date:   2015-01-19 (Mon, 19 Jan 2015)

  Changed paths:
    M src/gc/bits.d
    M src/gc/gc.d

  Log Message:
  -----------
  Merge pull request #1105 from MartinNowak/gcbits

cleanup gc bits


Compare: https://github.com/D-Programming-Language/druntime/compare/43199cdb8fa3...ce6edc5ab8ae