ninja: Add support for 'ninja_use_console' in actions/rules

Setting this to 1 will make ninja use 'pool = console' for the action/rule.

BUG=
R=thakis@chromium.org

Review URL: https://codereview.chromium.org/412283002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1955 78cadc50-ecff-11dd-a971-7dbc132099af