While working on our latest Ninja changes, we twice had users report problems - on OSX and then on Windows - after pushing our changes. We currently have compile_ninja, the task that would have exercised the changes, running on only one build variant - Enterprise Ubuntu 18.04 - which would have passed had it been run. We only execute compile_ninja_next on Enterprise Ubuntu 18.04, Enterprise Windows DEBUG (Unoptimized), and Enterprise macOS, two of which would have failed if compile_ninja had run instead.

We should ensure that both compile_ninja and compile_ninja_next run on -suggested build variants for Windows, OSX, RHEL, and Ubuntu so we have adequate coverage of any changes to the Ninja tool.