Add some dumping when SIGQUIT for the JIT.

Change-Id: Iad68bdc8a4ab53e810feb3bc8507b7f42e79b1f7
diff --git a/runtime/jit/jit_code_cache.h b/runtime/jit/jit_code_cache.h
index 4032c7b..205a3ed 100644
--- a/runtime/jit/jit_code_cache.h
+++ b/runtime/jit/jit_code_cache.h
@@ -154,6 +154,11 @@
 
   uint64_t GetLastUpdateTimeNs() REQUIRES(!lock_);
 
+  size_t GetCurrentCapacity() REQUIRES(!lock_) {
+    MutexLock lock(Thread::Current(), lock_);
+    return current_capacity_;
+  }
+
  private:
   // Take ownership of maps.
   JitCodeCache(MemMap* code_map,