Have Clang builders build in C++11 mode.

Have Clang builders build in C++11 mode.

This ought to get us a little ahead on the transition.  Only minor fixes
are needed.  The one in MemoryBench is the most interesting: what used
to unambiguously be interpreted as concatenating two string literals is
now also ambiguously a user-defined literal; adding a space
disambiguates.

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/170e00d6403c40114d6ffb800a5bfab73e0b0f34

[bungeman-skia, 2014-06-30 18:04:33]

lgtm

[mtklein, 2014-06-30 18:04:42]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-06-30 18:05:27]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/361723002/1

[commit-bot: I haz the power, 2014-06-30 18:21:47]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  Build-Ubuntu13.10-Clang-x86_64-Debug-Trybot on tryserver.skia
(http://108.170.220.76:10117/builders/Build-Ubuntu13.10-Clang-x86_64-Debug-Try...)

[commit-bot: I haz the power, 2014-06-30 18:29:57]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-30 18:29:57]

Try jobs failed on following builders:
  Build-Ubuntu13.10-Clang-x86_64-Debug-Trybot on tryserver.skia
(http://108.170.220.76:10117/builders/Build-Ubuntu13.10-Clang-x86_64-Debug-Try...)

[mtklein, 2014-06-30 18:35:34]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-06-30 18:36:36]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/361723002/20001

[commit-bot: I haz the power, 2014-06-30 18:53:37]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  Build-Ubuntu13.10-Clang-x86_64-Debug-Trybot on tryserver.skia
(http://108.170.220.76:10117/builders/Build-Ubuntu13.10-Clang-x86_64-Debug-Try...)

[commit-bot: I haz the power, 2014-06-30 19:06:18]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-06-30 19:06:19]

Try jobs failed on following builders:
  Build-Ubuntu13.10-Clang-x86_64-Debug-Trybot on tryserver.skia
(http://108.170.220.76:10117/builders/Build-Ubuntu13.10-Clang-x86_64-Debug-Try...)

[mtklein, 2014-06-30 19:15:45]

The CQ bit was checked by mtklein@google.com

[commit-bot: I haz the power, 2014-06-30 19:15:55]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/361723002/40001

[commit-bot: I haz the power, 2014-06-30 19:33:15]

Change committed as 170e00d6403c40114d6ffb800a5bfab73e0b0f34