[Doc] Guideline on adding exception handling support for a target
This is the first attempt to write down a guideline on adding exception handling support for a target. The content basically bases on the discussion on . If you guys know who is exception handling expert, please add him as the reviewer. Thanks.
Reviewers: t.p.northover, theraven, nemanjai
Reviewed By: theraven
Subscribers: sdardis, llvm-commits
Differential Revision: https://reviews.llvm.org/D42178