[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at 7546b29 [HIP] Support target id by --offload-arch
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   7546b29..a11ab6e  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to a11ab6e04c199c2a33d81c451e9e26bf18636dfc.
CMake Error at CMakeLists.txt:3 (cmake_minimum_required):
  CMake 3.13.4 or higher is required.  You are running version 3.7.1


-- Configuring incomplete, errors occurred!