Without the change `scandir()` fails on `i686-unknown-linux` if
`egl_vendor.d` contents contains files with inodes that overflow 32-bit
values. In my case it is `btrfs`:

    $ ls -i egl_vendor.d/
    5053988166 50_mesa.json

On `libEGL.so` I see the following symbol change (as reported by `nm`):

    -         U fopen@GLIBC_2.1
    -         U fstat@GLIBC_2.33
    -         U scandir@GLIBC_2.0
    +         U fopen64@GLIBC_2.1
    +         U fstat64@GLIBC_2.33
    +         U scandir64@GLIBC_2.2

The fix allowed to run 32-bit `es2gears_wayland` from `mesa-demos`
without failures.