update librispeech/s2 result

examples/librispeech/s2/README.md

 # LibriSpeech
 
-| Model | Params | Config | Augmentation| Loss |
-| --- | --- | --- | --- |
-| transformer | 32.52 M | conf/transformer.yaml | spec_aug | 6.3197922706604 |
+
+## Transformer
+
+| Model | Params | GPUS | Averaged Model | Config | Augmentation| Loss |
+| --- | --- | --- | --- | --- | --- |  
+| transformer | 32.52 M | 8 Tesla V100-SXM2-32GB | 10-best val_loss | conf/transformer.yaml | spec_aug | 6.3197922706604 |
 
 
 | Test Set | Decode Method | #Snt | #Wrd | Corr | Sub | Del | Ins | Err | S.Err |  
@@ -11,5 +14,14 @@
 | test-clean | ctc_greedy_search | 2620 | 52576 | 95.9 | 3.7 | 0.4 | 0.5 | 4.6 | 48.0 |  
 | test-clean | ctc_prefix_beamsearch | 2620 | 52576 | 95.9 | 3.7 | 0.4 | 0.5 | 4.6 | 47.6 |  
 | test-clean | attention_rescore | 2620 | 52576 | 96.8 | 2.9 | 0.3 | 0.4 | 3.7 | 38.0 |  
+
+### JoinCTC
+
+| Test Set | Decode Method | #Snt | #Wrd | Corr | Sub | Del | Ins | Err | S.Err |  
+| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
 | test-clean | join_ctc_only_att | 2620 | 52576 | 96.1 | 2.5 | 1.4 | 0.4 | 4.4 | 34.7 |  
-| test-clean | join_ctc_w/o_lm | 2620 | 52576 | 97.2 | 2.6 | 0.3 | 0.4 | 3.2 | 34.9 |  
\ No newline at end of file
+| test-clean | join_ctc_w/o_lm | 2620 | 52576 | 97.2 | 2.6 | 0.3 | 0.4 | 3.2 | 34.9 |  
+| test-clean | join_ctc_w_lm | 2620 | 52576 | 97.9 | 1.8 | 0.2 | 0.3 | 2.4 | 27.8 |  
+
+Compare with [ESPNET](https://github.com/espnet/espnet/blob/master/egs/librispeech/asr1/RESULTS.md#pytorch-large-transformer-with-specaug-4-gpus--transformer-lm-4-gpus) 
+we using 8gpu, but model size (aheads4-adim256) small than it.