meson: detect and use __attribute__((no_reorder))

meson: detect and use __attribute__((no_reorder))

In some builds (package builds, so with optimization and lto, but I
haven't been able to pin down the exact combination on options that
matters), we end up with items in the verbs array reordered. The order
matters (because of groups, but also because we have some specific order
for display), so this reordering is something that we don't want.

From what I was able to read, the compiler + linker generally keep the
order within a single translation unit, but this is more of a convention
and implementation choice than a guarantee. Add this attribute [1]. It
seems to have the desired effect in CI.

[1] https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gcc/Common-Function-Attributes.html#index-no_005freorder-function-attribute