Bug#924325: gcc-8-cross: FTBFS for unknown reasons

[Santiago Vila <sanvila@unex.es>]

I'm sorry that -j1 did not work for you, but this seems to fail every
time if you try in a single-CPU machine.

You can see it fail in real time here:

https://jenkins-1.reliable-builds.org/job/gcc-8-cross/

If trying in a single-CPU machine is a burden for you, please contact
me privately and I will gladly provide full access to a single-CPU
machine. (Same offer for Helmut in case he wants to confirm that this
bug is indeed real and not the result of a misconfiguration on my side).

Thanks.