AoT build fails using multiple apps in own project with dependency between them

[CSchulz]

Bug Report or Feature Request (mark with an x)

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

Versions.

@angular/cli: 1.4.4
node: 6.10.2
os: darwin x64
@angular/animations: 4.4.4
@angular/common: 4.4.4
@angular/compiler: 4.4.4
@angular/core: 4.4.4
@angular/forms: 4.4.4
@angular/http: 4.4.4
@angular/platform-browser: 4.4.4
@angular/platform-browser-dynamic: 4.4.4
@angular/router: 4.4.4
@angular/cli: 1.4.4
@angular/compiler-cli: 4.4.4
@angular/language-service: 4.4.4
typescript: 2.3.4

Repro steps.

https://github.com/CSchulz/angular-cli-multiple-apps-with-common

Start the project with npm start.

The log given by the failure.

ERROR in multiple-apps-with-common/showcase/$$_gendir/src/app.component.ngfactory.ts (10,21): Cannot find module '../../../src/app/common.component.ngfactory'.
ERROR in multiple-apps-with-common/showcase/$$_gendir/src/app/app.component.ngfactory.ts (11,21): Cannot find module './app.component'.
ERROR in multiple-apps-with-common/showcase/$$_gendir/src/app/common.component.ngfactory.ts (10,21): Cannot find module './common.component'.
ERROR in multiple-apps-with-common/showcase/$$_gendir/src/index.ngfactory.ts (10,21): Cannot find module './index'.
ERROR in multiple-apps-with-common/showcase/$$_gendir/src/index.ngfactory.ts (11,21): Cannot find module './app/app.component'.
ERROR in multiple-apps-with-common/showcase/$$_gendir/src/app.module.ngfactory.ts (12,21): Cannot find module '../../../src/app/app.component.ngfactory'.

Desired functionality.

The repository contains a common module, which is part of a library and the showcase should be used to show the functionality.

[filipesilva]

Heya, this is a duplicate of #6387. You can find an explanation for why this doesn't work in #6228 (comment).

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