Use -fblocks and -fobjc-nonfragile-abi when that is what is being tested, instead of forcing the triple.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89072 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGenObjC/forward-class-impl-metadata.m b/test/CodeGenObjC/forward-class-impl-metadata.m
index b8ce10a..5dfddde 100644
--- a/test/CodeGenObjC/forward-class-impl-metadata.m
+++ b/test/CodeGenObjC/forward-class-impl-metadata.m
@@ -1,4 +1,4 @@
-// RUN: clang-cc -triple x86_64-apple-darwin10 -emit-llvm -o %t %s
+// RUN: clang-cc -fobjc-nonfragile-abi -emit-llvm -o %t %s
 
 @interface BASE  {
 @private