pipe-loader: Use real galliumvl if radeonsi is being linked.

When switching to lld, I saw errors from multiply defined vl symbols due to
radeonsi always linking libgalliumvl.

Acked-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6324>
1 file changed