Add unit test for LSTM.
Add unit test for LSTM.

PiperOrigin-RevId: 283427129
Change-Id: Id46861e6cdfd867e055e8d984bb9d7bcfd4cc336

paolodedios/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,jhseu/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,tensorflow/tensorflow-experimental_link_static_libraries_once,tensorflow/tensorflow-experimental_link_static_libraries_once,cxxgtxy/tensorflow,Intel-tensorflow/tensorflow,karllessard/tensorflow,karllessard/tensorflow,gunan/tensorflow,gunan/tensorflow,renyi533/tensorflow,Intel-Corporation/tensorflow,sarvex/tensorflow,gunan/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,renyi533/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,renyi533/tensorflow,davidzchen/tensorflow,annarev/tensorflow,renyi533/tensorflow,petewarden/tensorflow,cxxgtxy/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,gunan/tensorflow,yongtang/tensorflow,yongtang/tensorflow,petewarden/tensorflow,gunan/tensorflow,aam-at/tensorflow,cxxgtxy/tensorflow,aam-at/tensorflow,renyi533/tensorflow,paolodedios/tensorflow,annarev/tensorflow,cxxgtxy/tensorflow,petewarden/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,xzturn/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,xzturn/tensorflow,freedomtan/tensorflow,Intel-Corporation/tensorflow,Intel-Corporation/tensorflow,renyi533/tensorflow,karllessard/tensorflow,frreiss/tensorflow-fred,paolodedios/tensorflow,gunan/tensorflow,Intel-tensorflow/tensorflow,gautam1858/tensorflow,gunan/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,karllessard/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,jhseu/tensorflow,frreiss/tensorflow-fred,yongtang/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,davidzchen/tensorflow,jhseu/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-experimental_link_static_libraries_once,davidzchen/tensorflow,petewarden/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,paolodedios/tensorflow,xzturn/tensorflow,sarvex/tensorflow,freedomtan/tensorflow,yongtang/tensorflow,frreiss/tensorflow-fred,davidzchen/tensorflow,paolodedios/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,aldian/tensorflow,Intel-Corporation/tensorflow,annarev/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,paolodedios/tensorflow,frreiss/tensorflow-fred,davidzchen/tensorflow,aldian/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,tensorflow/tensorflow,cxxgtxy/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,cxxgtxy/tensorflow,aam-at/tensorflow,Intel-tensorflow/tensorflow,freedomtan/tensorflow,gautam1858/tensorflow,davidzchen/tensorflow,aldian/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,paolodedios/tensorflow,renyi533/tensorflow,renyi533/tensorflow,petewarden/tensorflow,yongtang/tensorflow,tensorflow/tensorflow,gunan/tensorflow,petewarden/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,jhseu/tensorflow,tensorflow/tensorflow,gautam1858/tensorflow,petewarden/tensorflow,paolodedios/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,xzturn/tensorflow,gautam1858/tensorflow,freedomtan/tensorflow,sarvex/tensorflow,gautam1858/tensorflow,paolodedios/tensorflow,frreiss/tensorflow-fred,freedomtan/tensorflow,tensorflow/tensorflow,paolodedios/tensorflow,jhseu/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,gautam1858/tensorflow,gunan/tensorflow,sarvex/tensorflow,jhseu/tensorflow,sarvex/tensorflow,aam-at/tensorflow,tensorflow/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-pywrap_saved_model,gautam1858/tensorflow,Intel-tensorflow/tensorflow,aldian/tensorflow,gunan/tensorflow,gautam1858/tensorflow,annarev/tensorflow,renyi533/tensorflow,tensorflow/tensorflow-pywrap_saved_model,xzturn/tensorflow,aam-at/tensorflow,tensorflow/tensorflow-pywrap_saved_model,cxxgtxy/tensorflow,karllessard/tensorflow,karllessard/tensorflow,xzturn/tensorflow,davidzchen/tensorflow,davidzchen/tensorflow,Intel-Corporation/tensorflow,tensorflow/tensorflow,karllessard/tensorflow,freedomtan/tensorflow,renyi533/tensorflow,petewarden/tensorflow,jhseu/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,annarev/tensorflow,gunan/tensorflow,tensorflow/tensorflow,xzturn/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,yongtang/tensorflow,renyi533/tensorflow,aldian/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,jhseu/tensorflow,yongtang/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,xzturn/tensorflow,yongtang/tensorflow,annarev/tensorflow,karllessard/tensorflow,davidzchen/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,frreiss/tensorflow-fred,Intel-tensorflow/tensorflow,jhseu/tensorflow,freedomtan/tensorflow,aam-at/tensorflow,freedomtan/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,aldian/tensorflow,tensorflow/tensorflow-pywrap_tf_optimizer,jhseu/tensorflow,Intel-Corporation/tensorflow,petewarden/tensorflow,Intel-Corporation/tensorflow,sarvex/tensorflow,petewarden/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-pywrap_saved_model,frreiss/tensorflow-fred,davidzchen/tensorflow,yongtang/tensorflow,Intel-tensorflow/tensorflow,xzturn/tensorflow,karllessard/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,renyi533/tensorflow,frreiss/tensorflow-fred,paolodedios/tensorflow,jhseu/tensorflow,annarev/tensorflow,davidzchen/tensorflow,annarev/tensorflow,sarvex/tensorflow,jhseu/tensorflow,tensorflow/tensorflow-pywrap_saved_model,aam-at/tensorflow,frreiss/tensorflow-fred,aam-at/tensorflow,tensorflow/tensorflow-pywrap_saved_model,annarev/tensorflow,cxxgtxy/tensorflow,gautam1858/tensorflow,aam-at/tensorflow,xzturn/tensorflow,gautam1858/tensorflow,karllessard/tensorflow,aldian/tensorflow,aldian/tensorflow,Intel-tensorflow/tensorflow,tensorflow/tensorflow-experimental_link_static_libraries_once,xzturn/tensorflow,gunan/tensorflow,petewarden/tensorflow,xzturn/tensorflow,aam-at/tensorflow,annarev/tensorflow