[Bug target/109501] vec_test_data_class defines missing

[chip.kerchner at ibm dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109501

--- Comment #8 from Chip Kerchner <chip.kerchner at ibm dot com> ---
Well, then I'm asking GCC to add these to make it easier to use
`vec_test_data_class`