bug#26370: v0.12.0-2730-gfc5b12879 'guix system build' hangs on linux-libre-4.10.8

[Leo Famulari]

On Wed, Apr 05, 2017 at 10:55:45AM -0400, myglc2 wrote:
>   HOSTCC  scripts/mod/modpost.o
>   HOSTCC  scripts/mod/file2alias.o
>   HOSTCC  scripts/extract-cert
>   HOSTLD  scripts/genksyms/genksyms
>   CC      arch/x86/purgatory/purgatory.o
>   AS      arch/x86/purgatory/stack.o
>   AS      arch/x86/purgatory/setup-x86_64.o
>   CC      arch/x86/purgatory/sha256.o
>   AS      arch/x86/purgatory/entry64.o
>   CC      arch/x86/purgatory/string.o
>   HOSTLD  scripts/mod/modpost
>   LD      arch/x86/purgatory/purgatory.ro
>   BIN2C   arch/x86/purgatory/kexec-purgatory.c
>   CHK     include/generated/timeconst.h
>   CC      kernel/bounds.s
>   CHK     include/generated/bounds.h
>   UPD     include/generated/bounds.h

The latest versions of linux-libre (4.10.8, 4.9.20, 4.4.59) are all
hanging around this point. However, they did build in the past:

https://hydra.gnu.org/job/gnu/master/linux-libre-4.4.59.x86_64-linux
https://hydra.gnu.org/job/gnu/master/linux-libre-4.9.20.x86_64-linux
https://hydra.gnu.org/job/gnu/master/linux-libre-4.10.8.x86_64-linux

And 4.10.7 hangs in the same way, so I think the issue is in an
unrelated change.