[Bug sanitizer/81645] Learn UBSAN to support -fsanitize=builtin

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81645

Martin Liška <marxin at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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   Target Milestone|---                         |8.0
           Severity|normal                      |enhancement