Breakpoints get out of sync when @IonicPage() parameters are on multiple lines

**Description:**

When adding an @IonicPage decorator, everything is fine, but if @IoniPage parameters are written on multiple lines, breakpoints get out of sync.

**Steps to Reproduce:**
Add the following decorator on a component:
```
@IonicPage({
name: 'my-page',
segment: 'my-page/'
})
```
Then, try breakpoints in the component.

**Output:**

**My `ionic info`:**

```
cli packages: (/usr/lib/node_modules)

@ionic/cli-utils : 1.19.2
ionic (Ionic CLI) : 3.20.0

global packages:

cordova (Cordova CLI) : 8.0.0

local packages:

@ionic/app-scripts : 3.1.5
Cordova Platforms : none
Ionic Framework : ionic-angular 3.9.2

System:

Android SDK Tools : 26.1.1
Node : v8.10.0
npm : 5.6.0
OS : Linux 4.9

Environment Variables:

ANDROID_HOME : /home/martialp/Android/Sdk

Misc:

backend : pro

```

**Other Information:**

There is a similar problem on the [ionic forum](https://forum.ionicframework.com/t/debugger-breakpoint-not-correct-in-chrome-mapping-wrong/109950)