【gulp】livereloadxを実行する ref: http://qiita.com/sawadays0118/items/7e953244a9543d5b6be1

gulpfile.js

var gulp = require('gulp'),
    exec = require('child_process').exec;

gulp.task('livereloadx', function(){
    exec('livereloadx -s -p 8000');
});

gulp.task('livereloadx', ['livereloadx']);