Fix PR2041: restrict is not a keyword in c90.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@47160 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/c89.c b/test/Sema/c89.c
index e7568bc..4c89e82 100644
--- a/test/Sema/c89.c
+++ b/test/Sema/c89.c
@@ -30,3 +30,6 @@
 /* PR1999 */
 void test5(register);
 
+/* PR2041 */
+int *restrict;
+