pan/decode: Flush the dump file before crashing

Useful when debugging GPU faults.

Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32213>

src/panfrost/lib/genxml/decode.h

@@ -80,6 +80,7 @@ __pandecode_fetch_gpu_mem(struct pandecode_context *ctx, uint64_t gpu_va,
    if (!mem) {
       fprintf(stderr, "Access to unknown memory %" PRIx64 " in %s:%d\n", gpu_va,
               filename, line);
+      fflush(ctx->dump_stream);
       assert(0);
    }