Found that some package builds failed on the mistake in CMakeLists.txt
file, the failed packages and test builds were:
- CentOS 6
- CentOS 7
- Ubuntu 14.04
and static build based on Dockerfile.

The core of the issue is that CMake 2 does not support line continuation
with backslash.

The commit fixes the regression from
7b443650 ('feedback: add cmake option to
disable the daemon').

Follow up #3308