Enable wildcard support in projectile-verify-file

Allows to specify patterns like "*.cabal" and checks if any matching file can be found.

The only thing I am unsure about is the if this works in the remote case (https://github.com/bbatsov/projectile/blob/master/projectile.el#L425)
This can be simplified to `(projectile-expand-wildcards ...)` as it returns `nil` if there are no matching expansions.