build: update snapshot e2e setup to reflect builds repository rename
build: update snapshot e2e setup to reflect builds repository rename

Updates the snapshot e2e setup to reflect the builds repository rename
where `material2-builds` got renamed to `material-builds`.

geofffilippi/angular-cli,geofffilippi/angular-cli,clydin/angular-cli,angular/angular-cli,angular/angular-cli,angular/angular-cli,clydin/angular-cli,angular/angular-cli,geofffilippi/angular-cli,clydin/angular-cli,geofffilippi/angular-cli,clydin/angular-cli