bug#48024: glib-2.62.6 build fails i686

[Bone Baboon]

Mark H Weaver writes:
> Right.  Unfortunately, these timeouts are too short for many slower
> machines, such as 32-bit ARM systems.  Bone Baboon has also recently
> reported being unable to build 'glib' on a 32-bit i686 system due to
> these timeouts, even when making extreme efforts to reduce load from
> other processes.

Here is information on the computer that is having tests timeout when
building glib.

* 4 GiB of RAM installed (the maximum)

* i686 32-bit 1 Core with 2.6 GHz