vold: Switch from LOG -> SLOG

Change-Id: I48ee8bd90b47f5845f069cdf4d1b8ba6ecdb1b39
Signed-off-by: San Mehat <san@google.com>
diff --git a/NetlinkHandler.cpp b/NetlinkHandler.cpp
index 8a3ebcb..818db81 100644
--- a/NetlinkHandler.cpp
+++ b/NetlinkHandler.cpp
@@ -46,7 +46,7 @@
     const char *subsys = evt->getSubsystem();
 
     if (!subsys) {
-        LOGW("No subsystem found in netlink event");
+        SLOGW("No subsystem found in netlink event");
         return;
     }