[Bug other/81345] -Wall resets -Wstringop-overflow to 1 from the default 2

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81345

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to fail|7.1.0                       |8.0

--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
Removing 7.1 from Known to fail versions because unlike 8.0 (prior to r247401)
it doesn't use LangEnabledBy for -Wstringop-overflow.