gerrit: add CommentInput field to ReviewInput

CommentInput field is needed to post inline comments.

Fixes golang/go#18830

Change-Id: I04a77621f0bbbc587bbeb2e050ac363c3bbc7cf5
Reviewed-on: https://go-review.googlesource.com/35991
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed