libsysutils: Hide NetlinkListener error in recovery

* Prevents users from seeing this message in recovery:
  `E:recvmsg failed (No buffer space available)`

* This is caused by volume_manager (our addition in recovery) and
  hiding this error does not seem to have any negative side effect.

Change-Id: I0d65796961c3036289ed13c0b8949a27b5b97ad6

libsysutils/src/NetlinkListener.cpp

@@ -57,7 +57,11 @@ bool NetlinkListener::onDataAvailable(SocketClient *cli)
     count = TEMP_FAILURE_RETRY(uevent_kernel_recv(socket,
             mBuffer, sizeof(mBuffer), require_group, &uid));
     if (count < 0) {
+#ifdef __ANDROID_RECOVERY__
+        SLOGW("recvmsg failed (%s)", strerror(errno));
+#else
         SLOGE("recvmsg failed (%s)", strerror(errno));
+#endif
         return false;
     }