[Bug sanitizer/64706] New: -fsanitize=vptr is not documented

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64706

            Bug ID: 64706
           Summary: -fsanitize=vptr is not documented
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Keywords: documentation
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: burnus at gcc dot gnu.org
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org,
                    mpolacek at gcc dot gnu.org

-fsanitize=vptr is not yet documented.

(Found it while trying to find out whether it is implied by
-fsanitize=undefined or not.)