Tweak Sema::CheckLiteralKind() to also include block literals

This simplifies some diagnostic logic in checkUnsafeAssignLiteral(),
hopefully making it less error prone.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@170945 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed