Change nightly builds version to 1.4.0-SNAPSHOT (#27381)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/27381
Changing android nightly builds from master to version 1.4.0-SNAPSHOT, as we also have 1.3.0-SNAPSHOT from the branch v1.3.0
Test Plan: Imported from OSS
Differential Revision: D17773620
Pulled By: IvanKobzarev
fbshipit-source-id: c39a1dbf5e06f79c25367c3bc602cc8ce42cd939
