Fixed lint path for client js in gruntfile.
Fixed lint path for client js in gruntfile.

HelloHolyLi/node-build-monitor,HelloHolyLi/node-build-monitor,HelloHolyLi/node-build-monitor,Brantone/node-build-monitor,marcells/node-build-monitor,Brantone/node-build-monitor,marcells/node-build-monitor,Brantone/node-build-monitor