ART: Fix broken Checker test

MemoryBarrier test checked for Return instead of ReturnVoid. Checker
does not allow that after its recent update.

Change-Id: Id90f4ccc8a1416e24550b1f7cbf7fdae21a33783
diff --git a/test/476-checker-ctor-memory-barrier/src/Main.java b/test/476-checker-ctor-memory-barrier/src/Main.java
index 9badc0f..75cb1d7 100644
--- a/test/476-checker-ctor-memory-barrier/src/Main.java
+++ b/test/476-checker-ctor-memory-barrier/src/Main.java
@@ -157,7 +157,7 @@
   // CHECK-START: void Main.inlineNew() register (after)
   // CHECK:     MemoryBarrier kind:StoreStore
   // CHECK-NOT: {{.*}}
-  // CHECK:     Return
+  // CHECK:     ReturnVoid
 
   // CHECK-START: void Main.inlineNew() register (after)
   // CHECK-NOT: InvokeStaticOrDirect
@@ -168,7 +168,7 @@
   // CHECK-START: void Main.inlineNew1() register (after)
   // CHECK:     MemoryBarrier kind:StoreStore
   // CHECK-NOT: {{.*}}
-  // CHECK:     Return
+  // CHECK:     ReturnVoid
 
   // CHECK-START: void Main.inlineNew1() register (after)
   // CHECK-NOT: InvokeStaticOrDirect
@@ -179,7 +179,7 @@
   // CHECK-START: void Main.inlineNew2() register (after)
   // CHECK:     MemoryBarrier kind:StoreStore
   // CHECK-NOT: {{.*}}
-  // CHECK:     Return
+  // CHECK:     ReturnVoid
 
   // CHECK-START: void Main.inlineNew2() register (after)
   // CHECK-NOT: InvokeStaticOrDirect
@@ -191,7 +191,7 @@
   // CHECK:     MemoryBarrier kind:StoreStore
   // CHECK:     MemoryBarrier kind:StoreStore
   // CHECK-NOT: {{.*}}
-  // CHECK:     Return
+  // CHECK:     ReturnVoid
 
   // CHECK-START: void Main.inlineNew3() register (after)
   // CHECK-NOT: InvokeStaticOrDirect