Augments r258042; changes the AST matcher tests to use matchesNot and...

Augments r258042; changes the AST matcher tests to use matchesNot and EXPECT_TRUE instead of EXPECT_FALSE. Adds a matcher test to ensure that static member functions are properly handled. Generates the documentation from the matcher.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@258070 91177308-0d34-0410-b5e6-96231b3b80d8