[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at aa830e9 [LLVMgold.so][test] Fix tests after D84132/55fa315b0352
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   aa830e9..8d6aa688 master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 8d6aa688eeffea4b9151d1a208ed619ca50c823a.
CMake Error at CMakeLists.txt:6 (message):
  Your CMake version is 3.7.1.  The minimum version of CMake required to
  build LLVM is now 3.13.4.


-- Configuring incomplete, errors occurred!