Fix <rdar://problem/6765383> clang-6: clang does not appear to support declaring a static Block 'const'.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69306 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 9e8958c..083bf3b 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -854,6 +854,8 @@
   switch (getStmtClass()) {
   default:
     return false;
+  case BlockExprClass:
+    return true;
   case ParenExprClass:
     return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage();
   case ImplicitCastExprClass: