[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at badd726 Revert "[IR][GVN] allow intrinsics in Instruction's isCommutative query"
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   badd726..86163f8  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 86163f885b56436be0b52183d13f21a18f157dcd.
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!