[Bug driver/71429] Rename -W[no-]#pragma-messages to -W[no-]pragma-messages

[zeratul976 at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71429

--- Comment #2 from Nathan Ridge <zeratul976 at hotmail dot com> ---
Hmm, you're right. I was actually using clang, without realizing it. Sorry for
the noise.