Implement support for the __is_final type trait, to determine whether
a class is marked 'final', from Alberto Ganesh Barbati! Fixes
PR11462.

llvm-svn: 145775
diff --git a/clang/lib/Parse/ParseTentative.cpp b/clang/lib/Parse/ParseTentative.cpp
index d53839f..e682cb4 100644
--- a/clang/lib/Parse/ParseTentative.cpp
+++ b/clang/lib/Parse/ParseTentative.cpp
@@ -670,6 +670,7 @@
   case tok::kw___is_convertible_to:
   case tok::kw___is_empty:
   case tok::kw___is_enum:
+  case tok::kw___is_final:
   case tok::kw___is_literal:
   case tok::kw___is_literal_type:
   case tok::kw___is_pod: