Materialize legacy libc paths in the x64 sysroot.

crates/bds-ui/tests/packaging_assets.rs

@@ -195,8 +195,9 @@ fn tagged_releases_are_built_and_packaged_with_rust_tools() {
         "Architectures: arm64",
         "--download-only",
         "dpkg-deb --extract",
-        "ln -s usr/lib \"$sysroot/lib\"",
-        "ln -s usr/lib64 \"$sysroot/lib64\"",
+        "libc.so.6 libm.so.6 libmvec.so.1",
+        "cp -a \"$sysroot/usr/lib/x86_64-linux-gnu/$library\"",
+        "cp -a \"$sysroot/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2\"",
         "/usr/share/pkgconfig/.",
         "/opt/ruds-x64-sysroot",
     ] {