use C10_MOBILE/ANDROID/IOS (#15363)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15363
Didn't define C10_MOBILE in the numa file move diff: D13380559
move CAFFE2_MOBILE/ANDROID/IOS to c10
```
codemod -m -d caffe2 --extensions h,hpp,cc,cpp,mm "CAFFE2_MOBILE" "C10_MOBILE"
codemod -m -d caffe2 --extensions h,hpp,cc,cpp,mm "CAFFE2_ANDROID" "C10_ANDROID"
codemod -m -d caffe2 --extensions h,hpp,cc,cpp,mm "CAFFE2_IOS" "C10_IOS"
```
i-am-not-moving-c2-to-c10
Reviewed By: marcinkwiatkowski
Differential Revision: D13490020
fbshipit-source-id: c4f01cacbefc0f16d5de94155c26c92fd5d780e4
