[PATCH] Add a matcher for SubstNonTypeTemplateParmExpr.

[David Blaikie]

Another review where, from my perspective, the patch itself never made
it to the mailing list - is this just another case of starting a
review, then adding the mailing list to the review?

>From inspection of http://reviews.llvm.org/D4327 it looks like
(maybe?) the cfe-commits list was added when the review was created
(at least at the same timestamp), so I'm not sure why the initial
mailing wouldn't've reached the mailing list/my inbox.

http://reviews.llvm.org/D4327