change default build (in "make" wrapper) to ninja on all platforms

force-landed from https://codereview.chromium.org/206463007/ ;
the CommitQueue couldn't handle the diff properly for some reason



git-svn-id: http://skia.googlecode.com/svn/trunk@14003 2bbb7eff-a529-9590-31e7-b0007b416f81
5 files changed