branch core-updates updated (50b87bd -> 1d1fa93)

[Ludovic Courtès]

civodul pushed a change to branch core-updates
in repository guix.

      from  50b87bd   build-system/gnu: Strip only ELF files.
       new  91ee959   utils: Add 'ar-file?'.
       new  2bbc6db   utils: Factorize magic bytes detection.
       new  e8c7fdd   build-system/gnu: Strip 'ar' archives as well.
       new  1d1fa93   utils: Turn 'parallel-job-count' into a parameter.

The 4 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "adds" were already present in the repository and have only
been added to this reference.


Summary of changes:
 guix/build/gnu-build-system.scm |    2 +-
 guix/build/utils.scm            |   52 +++++++++++++++++++++++++++------------
 2 files changed, 37 insertions(+), 17 deletions(-)