[Arm] parallel batch axis (#3931)
[Arm] parallel batch axis (#3931)

* support LLVM trunk

* guard with USE_LLVM in if condition for c++14

* GREATER_EQUAL -> GREATER

* [Arm] parallel batch axis

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