[Bug target/109479] [RISC-V] Build vint64m1_t with rv64gc_zve32x_zvl64b should promote information like "vint64m1_t requires the 'zve64x' extensions"

[pan2.li at intel dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109479

--- Comment #5 from Li Pan <pan2.li at intel dot com> ---
Thanks kito, update the title for clarification.