D8315: CMake cleanup: Don't hardcode -std=c++0x

[Aleix Pol Gonzalez]

apol accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R279 ThreadWeaver

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D8315

To: kfunk, apol
Cc: #frameworks