Fix the testcase :-(

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154363 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/gold-lto.c b/test/Driver/gold-lto.c
index 646a59b..05ac27a 100644
--- a/test/Driver/gold-lto.c
+++ b/test/Driver/gold-lto.c
@@ -3,4 +3,4 @@
 // RUN: FileCheck %s < %t.log
 
 // CHECK: "-plugin" "{{.*}}/LLVMgold.so"
-// CHECK: "-plugin-arg=foo"
+// CHECK: "-plugin-opt=foo"