[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at a61272a [DAG] Fold vector mul(x,0)/mul(x,1) to a clearing mask
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   a61272a..010c445  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 010c445fcf94eafc8f89753171159d3c61e4fa44.
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!