Use faster-rnnlm by default in librispeech recipe

egs/librispeech/s5/local/run_rnnlm.sh

@@ -8,7 +8,7 @@ rnnlm_options="-hidden 150 -direct 1000 -direct-order 5"
 rnnlm_tag="h150_me5-1000"
 num_threads=8 # set this value to the number of physical cores on your CPU
 stage=0
-rnnlm_ver=rnnlm-hs-0.1b
+rnnlm_ver=faster-rnnlm
 # End configuration section.
 
 echo "$0 $@"  # Print the command line for logging