build: build addons into the "build" dir instead of "out"
build: build addons into the "build" dir instead of "out"

This matches the old node-waf system. Having two different dirs for this stuff
is dumb.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node