Revert "CMake 2.8.12.2"

This reverts commit a921557a6712dc94578c4c068cab55b32d1e3ed3.
The Ninja fix in this release candidate is not sufficient and
will be replaced in another candidate.
Merge topic 'test-release' into next

e514c3c7 Revert "CMake 2.8.12.2"