build: add .vimrc to gitignore (#24168)
build: add .vimrc to gitignore (#24168)

Adds .vimrc and .nvrc to the .gitignore file. This aligns components with how
angular/angular does it
https://github.com/angular/angular/blob/master/.gitignore.
angular/components,crisbeto/material2,angular/components,crisbeto/material2,angular/components,crisbeto/material2,crisbeto/material2,angular/components