adb: fix mistaken use of PLOG.

Change-Id: I60bfa3d8cf1572a877d6f0c9369d8f72f10e5aef
diff --git a/adb/adb_auth_client.cpp b/adb/adb_auth_client.cpp
index 8ef9948..128c3df 100644
--- a/adb/adb_auth_client.cpp
+++ b/adb/adb_auth_client.cpp
@@ -239,7 +239,7 @@
     }
 
     if (framework_fd >= 0) {
-        PLOG(WARNING) << "adb received framework auth socket connection again";
+        LOG(WARNING) << "adb received framework auth socket connection again";
         framework_disconnected();
     }