Separate out pytorch_jni into pytorch_jni_jit and pytorch_jni_common. (#29617)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/29617
As for internal build, we will use mobile interpreter instead of full jit, so we will need to separate the existing pytorch_jni.cpp into pytorch_jni_jit.cpp and pytorch_jni_common.cpp. pytorch_jni_common.cpp will be used both from pytorch_jni_jit.cpp(open_source) and future pytorch_jni_lite.cpp(internal).
ghstack-source-id: 93691214
Test Plan: buck build xplat/caffe2/android:pytorch
Reviewed By: dreiss
Differential Revision: D18387579
fbshipit-source-id: 26ab845c58a0959bc0fdf1a2b9a99f6ad6f2fc9c
