ART: Mask garbage-memory warnings

Add invariants or NOLINT to let clang-analyzer understand that
there's no garbage involved.

(The analysis itself is too expensive to force it on for all
 local builds.)

Test: mmma art
Change-Id: I6148d743321248195abb3a8f646e63941f11f9a9
diff --git a/test/ti-agent/breakpoint_helper.cc b/test/ti-agent/breakpoint_helper.cc
index db4ea61..83ba0a6 100644
--- a/test/ti-agent/breakpoint_helper.cc
+++ b/test/ti-agent/breakpoint_helper.cc
@@ -114,7 +114,7 @@
     return 0;
   }
   jlong start = 0;
-  jlong end = end;
+  jlong end;
   JvmtiErrorToException(env, jvmti_env, jvmti_env->GetMethodLocation(method, &start, &end));
   return start;
 }