PCH support for string literals

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69172 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/PCH/exprs.h b/test/PCH/exprs.h
index 49966a3..73e15fb 100644
--- a/test/PCH/exprs.h
+++ b/test/PCH/exprs.h
@@ -13,6 +13,9 @@
 // FloatingLiteral and ParenExpr
 typedef typeof((42.5)) floating_literal;
 
+// StringLiteral
+const char *hello = "Hello" "PCH" "World";
+
 // CharacterLiteral
 typedef typeof('a') char_literal;