Enhance CHECK_EQ and friends to allow extra detail to be appended (like CHECK).

Change-Id: Iaa980892ab31621c8bcca9ea7c6c4ee743333f45
diff --git a/src/class_linker.cc b/src/class_linker.cc
index 2cbac12..b480d87 100644
--- a/src/class_linker.cc
+++ b/src/class_linker.cc
@@ -1911,7 +1911,7 @@
   }
   if (ifcount == 0) {
     // TODO: enable these asserts with klass status validation
-    // DCHECK(klass->GetIfTableCount() == 0);
+    // DCHECK_EQ(klass->GetIfTableCount(), 0);
     // DCHECK(klass->GetIfTable() == NULL);
     return true;
   }