c3eaca6 tests: ninja is not ninja on RHEL7/ppc64/Epel, but cmake knows

Authored and Committed by mprchlik 2 years ago
    tests: ninja is not ninja on RHEL7/ppc64/Epel, but cmake knows
    
    By using `cmake --build` instead of calling `ninja` directly, test
    should run well on ppc64 even when `ninja-build` is all we have.