Print ninja stdout live during the build

When running ninja stream stdout to the status writer.  This improves
the ninja -d explain behavior, and will also allow Soong to be put
into the ninja console pool letting it print timely output to the
console.

Bug:  80165685
Test: NINJA_ARGS="-d explain" m
Change-Id: I40f03fc01d837ad91d400eae378007a7ce807705