Troy Aikman: “I’m a huge buyer of the 49ers, and I have been all season, and I have been for the last several years … A big reason for that is because of Kyle Shanahan.’ FRISCO – Troy Aikman has talked about the idea of some day becoming an NFL team’s GM, but for now, the iconic Dallas Cowboys QB just plays one on TV. And in doing do this week, he “hired” the guy he believes is the NFL’s best coach. If I was in a position to hire a head coach, and I could hire anybody I wanted,…