Implement most of the remaining logic in __is_literal type trait. This
should now support all of the C++98 types, and all of the C++0x types
Clang supports.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130079 91177308-0d34-0410-b5e6-96231b3b80d8
7 files changed