fix(@angular/cli): handle raw strings in config command

[clydin]

Fixes: #10949

[sannminwin]

It seems errors still exist

@angular/cli 6.0.8

I added styleExt: scss in angular.json

"projects": {
"staff-directory": {
"root": "",
"sourceRoot": "src",
"projectType": "application",
"prefix": "app",
"schematics": {
"@schematics/angular:component": {
"styleExt": "scss"
}
},

I changed every "css" to "scss" in angular.json

"styles": [
"src/styles.scss"
],

I changed header.component.css to "scss" . When I run "ng serve" , I got this error

ERROR in ./src/app/app.component.ts
Module not found: Error: Can't resolve './app.component.css' in '/Sites/angular/staff-directory/src/app'
ERROR in ./src/app/regions/header/header.component.ts
Module not found: Error: Can't resolve './header.component.css' in '/Sites/angular/staff-directory/src/app/regions/header'

[clydin]

@sannminwin Please do not reply to closed PRs.
Also, what you are describing is not related to the PR in question. If you suspect you have encountered a defect, please open an issue and include the requested information within the template.

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