When lexing in C11 mode, accept unicode character and string literals, per C11
6.4.4.4/1 and 6.4.5/1.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@176780 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed