Avoid binding const references to temporaries.

Test: Rely on TreeHugger.
Change-Id: I52930cfaea4b5e977f125500bb8c9160f9c8db33
diff --git a/runtime/jit/debugger_interface.cc b/runtime/jit/debugger_interface.cc
index 7cdd7c5..ae00044 100644
--- a/runtime/jit/debugger_interface.cc
+++ b/runtime/jit/debugger_interface.cc
@@ -143,7 +143,7 @@
 bool DeleteJITCodeEntryForAddress(uintptr_t address) {
   Thread* self = Thread::Current();
   MutexLock mu(self, g_jit_debug_mutex);
-  const auto& it = g_jit_code_entries.find(address);
+  const auto it = g_jit_code_entries.find(address);
   if (it == g_jit_code_entries.end()) {
     return false;
   }