ninja: don't exclude rustc native-static-link args

[elmarco]

rustc --crate-type staticlib --print native-static-libs doesn't print
the default libraries being linked with rustc by default, at least not
with rustc 1.89.0 (29483883e 2025-08-04).

Stripping those by default, such as ws2_32 on win32, prevents from
linking programs using sockets (ex qemu).

@bonzini @xclaesse

[elmarco]

it's actually more subtle than that, it seems to be due to the order of arguments, but I don't yet have a good reproducer.

@bonzini, you can easily reproduce with qemu --cross-prefix=x86_64-w64-mingw32- --enable-rust on fedora.

[bonzini]

it's actually more subtle than that, it seems to be due to the order of arguments, but I don't yet have a good reproducer.

That would make this patch correct. If a static library comes after the native libraries in the command line, it would not pick up the symbols even if it uses one of those libraries.

[eli-schwartz]

Isn't that exactly why meson uses --start-group? Only necessary on Unix linkers, since it implements what windows linkers do anyway.

[bonzini]

Isn't that exactly why meson uses --start-group?

It doesn't use it (yet) for Rust (#14026). But it wouldn't solve the problem because rustc adds these libraries outside of the arguments coming from Meson, and therefore the libraries would be close to Rust's libstd and outside the group.