Add some more DISALLOW_COPY_AND_ASSIGN

May help prevent bugs maybe.

Change-Id: Ie73d469dfcd078492ecb3aa28682b42707221202
diff --git a/runtime/jit/jit_instrumentation.cc b/runtime/jit/jit_instrumentation.cc
index 160e678..e2f9cec 100644
--- a/runtime/jit/jit_instrumentation.cc
+++ b/runtime/jit/jit_instrumentation.cc
@@ -47,6 +47,8 @@
  private:
   mirror::ArtMethod* const method_;
   JitInstrumentationCache* const cache_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(JitCompileTask);
 };
 
 JitInstrumentationCache::JitInstrumentationCache(size_t hot_method_threshold)