[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at 2f40e20 [flang][openacc] Fix device_num and device_type clauses for init directive
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   2f40e20..d2c61d2  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to d2c61d2bf9bd1efad49acba2f2751112522686aa.
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!