[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at cf5df40 Revert "[AddressSanitizer] Don't use weak linkage for __{start,stop}_asan_globals"
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   cf5df40..53880b8  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 53880b8cb9c61e81457d13c0adefe51ff41664fa.
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!