Allow log_softmax on explicit trailing dim (#1684)
Allow log_softmax on explicit trailing dim (#1684)


sxjscience/tvm,sxjscience/tvm,dmlc/tvm,Laurawly/tvm-1,Huyuwei/tvm,dmlc/tvm,dmlc/tvm,Laurawly/tvm-1,sxjscience/tvm,tqchen/tvm,sxjscience/tvm,dmlc/tvm,Huyuwei/tvm,dmlc/tvm,dmlc/tvm,Huyuwei/tvm,Huyuwei/tvm,tqchen/tvm,sxjscience/tvm,sxjscience/tvm,tqchen/tvm,tqchen/tvm,Laurawly/tvm-1,sxjscience/tvm,Huyuwei/tvm,Laurawly/tvm-1,tqchen/tvm,Laurawly/tvm-1,sxjscience/tvm,Laurawly/tvm-1,tqchen/tvm,Laurawly/tvm-1,Huyuwei/tvm,tqchen/tvm,dmlc/tvm,dmlc/tvm,tqchen/tvm,Laurawly/tvm-1,dmlc/tvm,Laurawly/tvm-1,Laurawly/tvm-1,Huyuwei/tvm,sxjscience/tvm,Huyuwei/tvm,tqchen/tvm,Huyuwei/tvm,tqchen/tvm