feat(@angular-devkit/build-angular): add `ignore` option to `assets` object
feat(@angular-devkit/build-angular): add `ignore` option to `assets` object

You can now provide an array of globs to `ignore` from copying

Closes #11850

angular/angular-cli,filipesilva/angular-cli,hansl/angular-cli,angular/angular-cli,filipesilva/angular-cli,hansl/angular-cli,DevIntent/angular-cli,filipesilva/angular-cli,catull/angular-cli,manekinekko/angular-cli,geofffilippi/angular-cli,beeman/angular-cli,catull/angular-cli,catull/angular-cli,DevIntent/angular-cli,ocombe/angular-cli,clydin/angular-cli,geofffilippi/angular-cli,ocombe/angular-cli,ocombe/angular-cli,filipesilva/angular-cli,ocombe/angular-cli,beeman/angular-cli,beeman/angular-cli,ocombe/angular-cli,beeman/angular-cli,DevIntent/angular-cli,Brocco/angular-cli,manekinekko/angular-cli,angular/angular-cli,catull/angular-cli,geofffilippi/angular-cli,hansl/angular-cli,Brocco/angular-cli,Brocco/angular-cli,Brocco/angular-cli,clydin/angular-cli,clydin/angular-cli,hansl/angular-cli,clydin/angular-cli,angular/angular-cli,geofffilippi/angular-cli,DevIntent/angular-cli,DevIntent/angular-cli,Brocco/angular-cli,manekinekko/angular-cli