Support for 0.8

[lissyx]

We have released 0.8 release, adding support on that binding might be a good thing. I might be able to send PR.

[lissyx]

$ LD_LIBRARY_PATH=$HOME/tmp/deepspeech/0.8.0/lib/:$LD_LIBRARY_PATH ~/go/bin/deepspeech -model ~/tmp/deepspeech/0.8.0/deepspeech-0.8.0-models.pbmm -scorer ~/tmp/deepspeech/0.8.0/deepspeech-0.8.0-models.scorer -audio ~/tmp/deepspeech/0.8.0/audio/4507-16021-0012.wav 
TensorFlow: v2.2.0-17-g0854bb5
DeepSpeech: v0.8.0-0-gf56b07d
2020-08-03 22:21:21.516560: I tensorflow/core/platform/cpu_feature_guard.cc:143] Your CPU supports instructions that this TensorFlow binary was not compiled to use: AVX2 FMA
Text: why should one hall on the way

[Quentin Renard]

Thanks !