[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at e9b87f4 [RFC] Factor out repetitive cmake patterns for llvm-style projects
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   e9b87f4..39fc4a0  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 39fc4a0b0af69772ee360b5f729b1ec453217793.
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!