[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at de1016c [driver][arm64] Set target CPU to A12 for compiler invocations that
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   de1016c..b0c1247  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to b0c12474ed16738faee42af6f727806517fb8b83.
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!