Fix a parser bug that prevented it from correctly parsing explicit construct expressoins of the form T{args}.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147155 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 3619017..8af7204 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -678,7 +678,8 @@
       if (Next.is(tok::coloncolon) ||
           (!ColonIsSacred && Next.is(tok::colon)) ||
           Next.is(tok::less) ||
-          Next.is(tok::l_paren)) {
+          Next.is(tok::l_paren) ||
+          Next.is(tok::l_brace)) {
         // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse.
         if (TryAnnotateTypeOrScopeToken())
           return ExprError();