Stamp non-`dom-*` template is untouched,
Stamp non-`dom-*` template is untouched,

Treat non-Polymer `<template is="smth">` as any other element. Do not change it to `<smth>`

Polymer/polymer/issues/4060
Polymer/polymer/issues/4068

JeremybellEU/polymer,Polymer/polymer,Polymer/polymer,JeremybellEU/polymer,Polymer/polymer,ikeagold/polymer,ikeagold/polymer,JeremybellEU/polymer,ikeagold/polymer