[Bug libgcc/117600] [15 regression] libgcc arm build doesn't respect --disable-werror

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117600

--- Comment #8 from Sam James <sjames at gcc dot gnu.org> ---
I'll note further that unconditional -Werror can be inappropriate with custom
*_FLAGS_FOR_TARGET and so on.