Fix the doc extraction script to work with hasAnyName and with equalsNode.

The change from llvm::VariadicFunction to internal::VariadicFunction
broke the extraction of hasAnyName().
equalsNode was broken because the argument type is 'const XXXX*' and
the internal space caused a failure on the regex.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@268548 91177308-0d34-0410-b5e6-96231b3b80d8