Implement warning for non-wide string literals with an unexpected encoding.  Downgrade error for non-wide character literals with an unexpected encoding to a warning for compatibility with gcc and older versions of clang.  <rdar://problem/10837678>.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@150295 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed