lib: virgo.gyp: build luvit too
lib: virgo.gyp: build luvit too

For the fixture server I want to use luvit. So, build ./out/Debug/luvit
too.

kaustavha/rackspace-monitoring-agent,virgo-agent-toolkit/rackspace-monitoring-agent,kaustavha/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,AlphaStaxLLC/rackspace-monitoring-agent,cp16net/virgo-base,cp16net/virgo-base,cp16net/virgo-base,christopherjwang/rackspace-monitoring-agent,cp16net/virgo-base,christopherjwang/rackspace-monitoring-agent,virgo-agent-toolkit/rackspace-monitoring-agent,cp16net/virgo-base