[iOS] 1.5.0 Cocoapods Release (#37039)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/37039
### Summary
Cocoapods 1.5.0 release. Binary has been pushed to AWS - https://ossci-ios.s3.amazonaws.com/libtorch_ios_1.5.0.zip
### Test Plan
- ` pod spec lint --verbose --allow-warnings --no-clean --use-libraries --skip-import-validation`
- TestApp
Test Plan: Imported from OSS
Differential Revision: D21169113
Pulled By: xta0
fbshipit-source-id: d015c218ed20b168a1ef21025db8880da4e3b074
