Fix ect including path

When using the ECT, trying to use the `<% extend 'layout' %>` (extends)
Single page designate the absolute path, but (include|extend) is designate the relative path(and wrong!)
Maybe, This same problem as issue #2223 

ECT module was wrapping on `consolidate.js` and,  You can designate base path.
But couldn't rewite from app side.
And fix it.