Literally has been used as an intensifier for a figurative expression since the 1800s and has been defined in the dictionary that way for quite a while.
It was used in this manner by Charles Dickens, James Joyce and American authors as well.
Although, it pisses me off when I hear it used that way.
Unfortunately that usage makes the word completely useless for its actual meaning. It could have been a very useful word.
And I suppose no one will ever be able to describe the act of walking quick in work out clothes again because of all the people “running” to the store.