Fixed test memory leaks

src/platform-linux.cc

Index: src/platform-linux.cc
diff --git a/src/platform-linux.cc b/src/platform-linux.cc
index 88b28c572d89c5b6cc765b9c0d3ab897b74e0402..e6699b4238a866388c1d8a7efd1f237ffde30b2f 100644
--- a/src/platform-linux.cc
+++ b/src/platform-linux.cc
@@ -467,6 +467,7 @@ class ThreadHandle::PlatformData : public Malloced {
       case ThreadHandle::INVALID: thread_ = kNoThread; break;
     }
   }
+
   pthread_t thread_;  // Thread handle for pthread.
 };