chore(gitignore): remove unnecessary asterisk (#3734)

Author: eruan

packages/angular-cli/blueprints/ng2/files/gitignore

@@ -16,7 +16,7 @@
 .settings/
 
 # IDE - VSCode
-.vscode/*
+.vscode/
 !.vscode/settings.json
 !.vscode/tasks.json
 !.vscode/launch.json