Put the primary builder into the console pool
Put the primary builder into the console pool

The primary builder should always be running on its own with no
other processes running in parallel, so put it in the console
pool so that it can print to stdout without buffering.

Bug: 80165685
Test: build with print in Soong
Change-Id: If34ecdb5fa18de7e47c4cd6965d551c504850176

danw/blueprint,danw/blueprint,google/blueprint,google/blueprint