[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at 24f406e Relax newly added opcode alias check to check only for a number instead of a specific opcode.
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   24f406e..045a620  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 045a620c455d2f27a536d687ee6a0299b9e2c734.
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!