added -fblocks to the test.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71890 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/block-sentinel-attribute.c b/test/Sema/block-sentinel-attribute.c
index 68d3614..c78f526 100644
--- a/test/Sema/block-sentinel-attribute.c
+++ b/test/Sema/block-sentinel-attribute.c
@@ -1,4 +1,4 @@
-// RUN: clang-cc -fsyntax-only -verify %s
+// RUN: clang-cc -fblocks -fsyntax-only -verify %s
 
 void (^e) (int arg, const char * format, ...) __attribute__ ((__sentinel__ (1,1)));