[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at f134fc4 Reland "[SLC] sprintf(dst, "%s", str) -> strcpy(dst, str)"
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   f134fc4..3aecf4bd master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 3aecf4bdf3f87e674724ad58d94c4b728feecb2e.
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!