[libclang] Introduce clang_Cursor_isVariadic, which returns non-zero if the given cursor is a variadic function or method.

rdar://13667150

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@179819 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed