[PATCH] clang-format: Add column layout formatting for braced lists

[Daniel Jasper]

Hi klimek,

With this patch, braced lists (with more than 3 elements are formatted in a column layout if possible). E.g.:

  static const uint16_t CallerSavedRegs64Bit[] = {
    X86::RAX, X86::RDX, X86::RCX, X86::RSI, X86::RDI,
    X86::R8,  X86::R9,  X86::R10, X86::R11, 0
  };

Required other changes:
- FormatTokens can now have a special role that contains extra data and can do special formattings. A comma separated list is currently the only implementation.
- Move penalty calculation entirely into ContinuationIndenter (there was a last piece still in UnwrappedLineFormatter).

http://llvm-reviews.chandlerc.com/D1457

Files:
  lib/Format/CMakeLists.txt
  lib/Format/ContinuationIndenter.cpp
  lib/Format/ContinuationIndenter.h
  lib/Format/Format.cpp
  lib/Format/FormatToken.cpp
  lib/Format/FormatToken.h
  lib/Format/TokenAnnotator.cpp
  unittests/Format/FormatTest.cpp
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