Fix cpplint whitespace/parens issues

Change-Id: Ifc678d59a8bed24ffddde5a0e543620b17b0aba9
diff --git a/runtime/thread_list.cc b/runtime/thread_list.cc
index 59c38b4..7aa835a 100644
--- a/runtime/thread_list.cc
+++ b/runtime/thread_list.cc
@@ -468,7 +468,7 @@
       // Wait for another thread to exit before re-checking.
       thread_exit_cond_.Wait(self);
     }
-  } while(!all_threads_are_daemons);
+  } while (!all_threads_are_daemons);
 }
 
 void ThreadList::SuspendAllDaemonThreads() {