Add representation of base classes in the AST, and verify that we
don't have duplicated direct base classes.

Seriliazation of base class specifiers is not yet implemented.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57991 91177308-0d34-0410-b5e6-96231b3b80d8
10 files changed