I've often wondered whether this be the case.
He cannot move out of the embassy. So if the U.S extradite him he can leave.
According to Presidential powers to pardon:
"In the United States, the pardon power for federal crimes is granted to the President of the United States under Article II, Section 2 of the United States Constitution which states that the President "shall have power to grant reprieves and pardons for offenses against the United States."
Technically speaking Julian has committed offenses against the United States. Assuming he is still in the embassy it isn't hard to believe a judge might extradite him to face trial for the DNC stuff and Trump could then pardon him of all crimes.
Leaving him free to settle in Ecuador.
This will turn out to be a major win for Trump and annoy liberals in the process.