[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at 44a4f93 [VE] Optimize leaf functions
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   44a4f93..a6e353b  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to a6e353b1d0831867225825d8580bad48174577ae.
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!