I set a limit for ninja/cmake to only run 4 or so cores when I was getting hang ups when doing a large compile. Rename ninja to oninja, make an executable shel

I set a limit for ninja/cmake to only run 4 or so cores when I was getting hang ups when doing a large compile. Rename ninja to oninja, make an executable shell script in the ninja directory ninja. #!/bin/sh oninja $@ -j4