Summary: Previously, `VisitAttributes` was not called for function and class templates and thus their attributes were not accessible using libclang.

Reviewers: bkramer, arphaman, rsmith, jbcoe

Reviewed By: jbcoe

Subscribers: cfe-commits

Tags: #clang

Patch by jklaehn (Johann Klähn)

Differential Revision: https://reviews.llvm.org/D36955

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@315958 91177308-0d34-0410-b5e6-96231b3b80d8