fix(completion): Update with the new help command (angular#3479)

Author: Wenchen Li

packages/angular-cli/blueprints/ng2/files/README.md

@@ -28,4 +28,4 @@ Run `ng github-pages:deploy` to deploy to Github Pages.
 
 ## Further help
 
-To get more help on the `angular-cli` use `ng --help` or go check out the [Angular-CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
+To get more help on the `angular-cli` use `ng help` or go check out the [Angular-CLI README](https://github.com/angular/angular-cli/blob/master/README.md).

packages/angular-cli/utilities/completion.sh

@@ -6,7 +6,7 @@
 #           or  ng completion 1>> ~/.zshrc 2>>&1
 #
 
-ng_opts='b build completion doc e2e g generate get github-pages:deploy gh-pages:deploy h help i init install lint make-this-awesome new s serve server set t test v version -h --help'
+ng_opts='b build completion doc e2e g generate get github-pages:deploy gh-pages:deploy h help i init install lint make-this-awesome new s serve server set t test v version'
 
 build_opts='--aot --base-href --environment --output-path --progress --sourcemap --suppress-sizes --target --vendor-chunk --verbose --watch --watcher -bh -dev -e -o -prod -sm -t -w'
 generate_opts='class component directive enum module pipe route service c cl d e m p r s --help'