exclude some caffe2 modules from libtorch mobile build (#20000)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20000
ghimport-source-id: f47773ef1c6849cd0c0e65080400416c6b370d39
Test Plan:
- verified libtorch mobile library builds and links successfully;
Imported from OSS
Differential Revision: D15169024
Pulled By: ljk53
fbshipit-source-id: 20ac89c6e7053239c93e51f00c5c5dc3595bea74
