[PATCH] D39539: [Support] Don't error out on multiple occurrances of an Optional flag

[Zachary Turner via Phabricator via llvm-commits]

zturner added a comment.

Agreed.  `Optional` should basically be called `OneOrZero`.  And if you think about it in those terms, it obviously doesn't make sense to allow it to be specified more than once.

Just change this specific option to be `ZeroOrMore`


https://reviews.llvm.org/D39539