[Bug testsuite/63211] gcc.target/i386/avx2-*.c tests use broken type-punning

[kyukhin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63211

--- Comment #2 from Kirill Yukhin <kyukhin at gcc dot gnu.org> ---
Confirmed. We'll fix that.