Nope, but then again it is not certain that Hillary said it and even if she did, is that a lie? It happened shortly after the attack, things where still very fluent and it is not like secretary Clinton had the 20/20 hindsight vision of millions and millions worth of republican Benghazi investigations. She may have said it, because that too is still not certain. Some families says she did and others say she didn't. At best it is a he said/she said.
But again, it is not certainly an intentional lie, because Mrs. Clinton might at that confused time still think that the video was partly/wholly to blame.
And sadly lying is a bad habit both political candidates have issues with Hillary lies, sometimes she doubles down but Devious Donald also lies, and then doubles down, triples down, etc. etc. etc.
Also, it is not anything like the comments that Trump has made towards the Khan family. Because unlike Trump Hillary Clinton has just said she disagreed with Pat Smith on her claims, you can say that is calling her a liar but while that may be the end result of her saying she disagrees, it is still not the same thing as saying Pat Smith is a liar.
And I can understand why Trump and his supporters want to make this issue go away but then their candidate should think before he speaks nonsense or attacks a gold star mother of not being allowed to speak due to her religion. And then doubling down on it. And keep talking about it. And again keep talking about it. And making him doing his work (building golf courses/building) is not something he should compare with the sacrifice the Khan family (and most military families to varying degrees) have made because what Trump did was not a sacrifice at all, and especially not one comparable to the Khan/gold family sacrifices have made.
And it is not like only democrats have been speaking out against Trumps stupidity in this case (and his stupid words), several republicans have done the same.