Main idea of this change is to make a small executable which will set OMP_WAIT_POLICY environment variable and then will launch blender itself. This is a teporary solution for the time being we'll have a more clear solution to high CPU usage with OpenMP when building with MSVC. Reviewers: campbellbarton, juicyfruit Reviewed By: juicyfruit Differential Revision: https://developer.blender.org/D717