Bug#927230: cross-gcc-dev: gcc-9 patch application failure

I just uploaded cross-gcc-dev=242 to apply this patch. I did just try to
actually build a cross compiler using these patches (something I haven't
done in a long time), and this patch is clearly necessary.

The build still didn't complete, because some other patch in
gcc-9-source doesn't apply anymore. This has nothing to do with the
cross-building, and I suspect that your problem is fixed now. Please let
me know if you still have trouble building, and I can look more deeply,
if necessary.