* guix/build/make-bootstrap.scm (copy-linux-headers): New procedure; extract
from make-stripped-libc and add headers for Mes bootstrap.
(make-stripped-libc): Use it.
In glibc-2.25 a dependency on "linux/falloc.h" was added.
This also reverts commit 8f8f250bdc
which is no longer needed. This commit was not compatible with
the glibc version Hurd is using. See
<https://lists.gnu.org/archive/html/guix-devel/2017-02/msg01046.html>
* guix/build/make-bootstrap.scm (make-stripped-libc): Copy "falloc.h"
to the new system.
* gnu/packages/patches/glibc-bootstrap-system.patch: Remove part
that touches fcntl-linux.h.
Problem reported by Andreas Enge <andreas@enge.fr>.
* gnu/packages/make-bootstrap.scm (%glibc-bootstrap-tarball): Make it a procedure.
(%glibc-stripped): Make it a procedure and move the kernel specific part from
here to ...
* guix/build/make-bootstrap.scm (make-stripped-libc): ... here. New file.
* Makefile.am (MODULES): Add it.
