Display app name in process.title if running specific app

[antonrademaker]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request

Versions.

@angular/cli: 1.1.3
node: 8.1.0
os: win32 x64
@angular/animations: 4.2.4
@angular/cli: 1.1.3
@angular/common: 4.2.4
@angular/compiler: 4.2.4
@angular/compiler-cli: 4.2.4
@angular/core: 4.2.4
@angular/forms: 4.2.4
@angular/http: 4.2.4
@angular/platform-browser: 4.2.4
@angular/platform-browser-dynamic: 4.2.4
@angular/platform-server: 4.2.4
@angular/router: 4.2.4
@angular/service-worker: 1.0.0-beta.16

Repro steps.

ng serve --app 1
Other window:
ng serve --app 2

The log given by the failure.

Powershell Window title 1: @angular/cli
Powershell Window title 2: @angular/cli

Desired functionality.

If you're developing multiple apps inside one project, the process title for all running angular/cli processes is set to "@angular/cli". This is used in for example Powershell as the Window title. It would be nice to see the app name or the host name in the window title. This makes it much easier to see which angular-cli instance is running inside that window.

Powershell Window title 1: @angular/cli - appname1
Powershell Window title 2: @angular/cli - appname2

Mention any other details that might be useful.

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