/usr/lib/clang/3.6/include is in libclang-common-3.6-dev 1:3.6.2-3ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/clang/3.6/../../llvm-3.6/lib/clang/3.6.2/include
/usr/lib/clang/3.6/../../llvm-3.6/lib/clang/3.6.2/include