[www-scripts] Clang Attribute Doc Update: ERROR

[root via www-scripts]

UPDATING LLVM SOURCES
HEAD is now at dde98c8 Fix issue in typo handling which could lead clang to hang
>From https://github.com/llvm/llvm-project
 * branch            master     -> FETCH_HEAD
   dde98c8..1bc5c84  master     -> origin/master
First, rewinding head to replay your work on top of it...
Fast-forwarded master to 1bc5c84710a8c73ef21295e63c19d10a8c71f2f5.
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!