Silence a false positive memory leak warning.

This silences a false positive memory leak warning:

frameworks/native/libs/binder/IPCThreadState.cpp:689:5: warning: Potential
memory leak [clang-analyzer-cplusplus.NewDeleteLeaks]

Bug: b/27101951
Test: The warning is gone.
Change-Id: I2d7bbb943521df86debb3a0e1b4b7457fa847098
diff --git a/libs/binder/IPCThreadState.cpp b/libs/binder/IPCThreadState.cpp
index 0b390c5..1c3fab4 100644
--- a/libs/binder/IPCThreadState.cpp
+++ b/libs/binder/IPCThreadState.cpp
@@ -686,7 +686,7 @@
 #if LOG_REFCOUNTS
     ALOGV("IPCThreadState::expungeHandle(%ld)\n", handle);
 #endif
-    self()->mProcess->expungeHandle(handle, binder);
+    self()->mProcess->expungeHandle(handle, binder); // NOLINT
 }
 
 status_t IPCThreadState::requestDeathNotification(int32_t handle, BpBinder* proxy)