Minor documentation corrections

Author: ChadKillingsworth

packages/google-closure-compiler/docs/grunt.md

@@ -6,7 +6,7 @@ Task targets, files and options may be specified according to the grunt
 Include the plugin in your Gruntfile.js:
 
 ```js
-import {grunt as gruntPlugin} from 'google-closure-compiler';
+import {CONTRIB_PATH, grunt as gruntPlugin} from 'google-closure-compiler';
 
 gruntPlugin(grunt, {
   platform: ['native', 'java'],
@@ -39,6 +39,8 @@ grunt.initConfig({
         'dest/output.min.js': ['src/js/**/*.js']
       },
       options: {
+        js: '/node_modules/google-closure-library/**.js',
+        externs: `${CONTRIB_PATH}/externs/jquery-1.9.js`,
         compilation_level: 'SIMPLE',
         language_in: 'ECMASCRIPT5_STRICT',
         create_source_map: 'dest/output.min.js.map',

packages/google-closure-compiler/docs/gulp.md

@@ -88,7 +88,19 @@ be allocated. Both the grunt and gulp plugins support this.
 ```js
 import {gulp as closureCompiler} from 'google-closure-compiler';
 
-closureCompiler({
-  extraArguments: ['-Xms2048m']
+gulp.task('js-compile', function () {
+  return gulp.src('./src/js/**/*.js', {base: './'})
+      .pipe(closureCompiler({
+        compilation_level: 'SIMPLE',
+        warning_level: 'VERBOSE',
+        language_in: 'ECMASCRIPT6_STRICT',
+        language_out: 'ECMASCRIPT5_STRICT',
+        output_wrapper: '(function(){\n%output%\n}).call(this)',
+        js_output_file: 'output.min.js'
+      }, {
+        extraArguments: ['-Xms2048m']
+      }))
+      .pipe(gulp.dest('./dist/js'));
 });
+
 ```