vtn_bindgen2: Fix memory corruption

This sometimes causes memory corruption, specifically on 32-bit x86
where it can result in a build failure

Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33847>

src/compiler/spirv/vtn_bindgen2.c

@@ -75,8 +75,8 @@ lower_to_bindgen_return(nir_shader *nir)
        * parameters.
        */
       libfunc->num_params--;
-      memcpy(libfunc->params, libfunc->params + 1,
-             sizeof(libfunc->params[0]) * libfunc->num_params);
+      memmove(libfunc->params, libfunc->params + 1,
+              sizeof(libfunc->params[0]) * libfunc->num_params);
    }
 }