Merge pull request #15424 from mshabunin:add-cmake-docs
authorAlexander Alekhin <alexander.a.alekhin@gmail.com>
Tue, 3 Sep 2019 10:50:45 +0000 (10:50 +0000)
committerAlexander Alekhin <alexander.a.alekhin@gmail.com>
Tue, 3 Sep 2019 10:50:45 +0000 (10:50 +0000)

Trivial merge